htmx-demo/contactsapp/static/js/htmx-1.8.0.js

//AMD insanity
(function (root, factory) {
    //@ts-ignore
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        //@ts-ignore
        define([], factory);
    } else {
        // Browser globals
        root.htmx = root.htmx || factory();
    }
}(typeof self !== 'undefined' ? self : this, function () {
return (function () {
        'use strict';

        // Public API
        //** @type {import("./htmx").HtmxApi} */
        // TODO: list all methods in public API
        var htmx = {
            onLoad: onLoadHelper,
            process: processNode,
            on: addEventListenerImpl,
            off: removeEventListenerImpl,
            trigger : triggerEvent,
            ajax : ajaxHelper,
            find : find,
            findAll : findAll,
            closest : closest,
            values : function(elt, type){
                var inputValues = getInputValues(elt, type || "post");
                return inputValues.values;
            },
            remove : removeElement,
            addClass : addClassToElement,
            removeClass : removeClassFromElement,
            toggleClass : toggleClassOnElement,
            takeClass : takeClassForElement,
            defineExtension : defineExtension,
            removeExtension : removeExtension,
            logAll : logAll,
            logger : null,
            config : {
                historyEnabled:true,
                historyCacheSize:10,
                refreshOnHistoryMiss:false,
                defaultSwapStyle:'innerHTML',
                defaultSwapDelay:0,
                defaultSettleDelay:20,
                includeIndicatorStyles:true,
                indicatorClass:'htmx-indicator',
                requestClass:'htmx-request',
                addedClass:'htmx-added',
                settlingClass:'htmx-settling',
                swappingClass:'htmx-swapping',
                allowEval:true,
                inlineScriptNonce:'',
                attributesToSettle:["class", "style", "width", "height"],
                withCredentials:false,
                timeout:0,
                wsReconnectDelay: 'full-jitter',
                disableSelector: "[hx-disable], [data-hx-disable]",
                useTemplateFragments: false,
                scrollBehavior: 'smooth',
                defaultFocusScroll: false,
            },
            parseInterval:parseInterval,
            _:internalEval,
            createEventSource: function(url){
                return new EventSource(url, {withCredentials:true})
            },
            createWebSocket: function(url){
                return new WebSocket(url, []);
            },
            version: "1.8.0"
        };

        /** @type {import("./htmx").HtmxInternalApi} */
        var internalAPI = {
            addTriggerHandler: addTriggerHandler,
            bodyContains: bodyContains,
            canAccessLocalStorage: canAccessLocalStorage,
            filterValues: filterValues,
            hasAttribute: hasAttribute,
            getAttributeValue: getAttributeValue,
            getClosestMatch: getClosestMatch,
            getExpressionVars: getExpressionVars,
            getHeaders: getHeaders,
            getInputValues: getInputValues,
            getInternalData: getInternalData,
            getSwapSpecification: getSwapSpecification,
            getTriggerSpecs: getTriggerSpecs,
            getTarget: getTarget,
            makeFragment: makeFragment,
            mergeObjects: mergeObjects,
            makeSettleInfo: makeSettleInfo,
            oobSwap: oobSwap,
            selectAndSwap: selectAndSwap,
            settleImmediately: settleImmediately,
            shouldCancel: shouldCancel,
            triggerEvent: triggerEvent,
            triggerErrorEvent: triggerErrorEvent,
            withExtensions: withExtensions,
        }

        var VERBS = ['get', 'post', 'put', 'delete', 'patch'];
        var VERB_SELECTOR = VERBS.map(function(verb){
            return "[hx-" + verb + "], [data-hx-" + verb + "]"
        }).join(", ");

        //====================================================================
        // Utilities
        //====================================================================

        function parseInterval(str) {
            if (str == undefined)  {
                return undefined
            }
            if (str.slice(-2) == "ms") {
                return parseFloat(str.slice(0,-2)) || undefined
            }
            if (str.slice(-1) == "s") {
                return (parseFloat(str.slice(0,-1)) * 1000) || undefined
            }
            if (str.slice(-1) == "m") {
                return (parseFloat(str.slice(0,-1)) * 1000 * 60) || undefined
            }
            return parseFloat(str) || undefined
        }

        /**
         * @param {HTMLElement} elt
         * @param {string} name
         * @returns {(string | null)}
         */
        function getRawAttribute(elt, name) {
            return elt.getAttribute && elt.getAttribute(name);
        }

        // resolve with both hx and data-hx prefixes
        function hasAttribute(elt, qualifiedName) {
            return elt.hasAttribute && (elt.hasAttribute(qualifiedName) ||
                elt.hasAttribute("data-" + qualifiedName));
        }

        /**
         *
         * @param {HTMLElement} elt
         * @param {string} qualifiedName
         * @returns {(string | null)}
         */
        function getAttributeValue(elt, qualifiedName) {
            return getRawAttribute(elt, qualifiedName) || getRawAttribute(elt, "data-" + qualifiedName);
        }

        /**
         * @param {HTMLElement} elt
         * @returns {HTMLElement | null}
         */
        function parentElt(elt) {
            return elt.parentElement;
        }

        /**
         * @returns {Document}
         */
        function getDocument() {
            return document;
        }

        /**
         * @param {HTMLElement} elt
         * @param {(e:HTMLElement) => boolean} condition
         * @returns {HTMLElement | null}
         */
        function getClosestMatch(elt, condition) {
            while (elt && !condition(elt)) {
                elt = parentElt(elt);
            }

            return elt ? elt : null;
        }

        function getAttributeValueWithDisinheritance(initialElement, ancestor, attributeName){
            var attributeValue = getAttributeValue(ancestor, attributeName);
            var disinherit = getAttributeValue(ancestor, "hx-disinherit");
            if (initialElement !== ancestor && disinherit && (disinherit === "*" || disinherit.split(" ").indexOf(attributeName) >= 0)) {
                return "unset";
            } else {
                return attributeValue
            }
        }

        /**
         * @param {HTMLElement} elt
         * @param {string} attributeName
         * @returns {string | null}
         */
        function getClosestAttributeValue(elt, attributeName) {
            var closestAttr = null;
            getClosestMatch(elt, function (e) {
                return closestAttr = getAttributeValueWithDisinheritance(elt, e, attributeName);
            });
            if (closestAttr !== "unset") {
                return closestAttr;
            }
        }

        /**
         * @param {HTMLElement} elt
         * @param {string} selector
         * @returns {boolean}
         */
        function matches(elt, selector) {
            // @ts-ignore: non-standard properties for browser compatability
            // noinspection JSUnresolvedVariable
            var matchesFunction = elt.matches || elt.matchesSelector || elt.msMatchesSelector || elt.mozMatchesSelector || elt.webkitMatchesSelector || elt.oMatchesSelector;
            return matchesFunction && matchesFunction.call(elt, selector);
        }

        /**
         * @param {string} str
         * @returns {string}
         */
        function getStartTag(str) {
            var tagMatcher = /<([a-z][^\/\0>\x20\t\r\n\f]*)/i
            var match = tagMatcher.exec( str );
            if (match) {
                return match[1].toLowerCase();
            } else {
                return "";
            }
        }

        /**
         *
         * @param {string} resp
         * @param {number} depth
         * @returns {Element}
         */
        function parseHTML(resp, depth) {
            var parser = new DOMParser();
            var responseDoc = parser.parseFromString(resp, "text/html");

            /** @type {Element} */
            var responseNode = responseDoc.body;
            while (depth > 0) {
                depth--;
                // @ts-ignore
                responseNode = responseNode.firstChild;
            }
            if (responseNode == null) {
                // @ts-ignore
                responseNode = getDocument().createDocumentFragment();
            }
            return responseNode;
        }

        /**
         *
         * @param {string} resp
         * @returns {Element}
         */
        function makeFragment(resp) {
            if (htmx.config.useTemplateFragments) {
                var documentFragment = parseHTML("<body><template>" + resp + "</template></body>", 0);
                // @ts-ignore type mismatch between DocumentFragment and Element.
                // TODO: Are these close enough for htmx to use interchangably?
                return documentFragment.querySelector('template').content;
            } else {
                var startTag = getStartTag(resp);
                switch (startTag) {
                    case "thead":
                    case "tbody":
                    case "tfoot":
                    case "colgroup":
                    case "caption":
                        return parseHTML("<table>" + resp + "</table>", 1);
                    case "col":
                        return parseHTML("<table><colgroup>" + resp + "</colgroup></table>", 2);
                    case "tr":
                        return parseHTML("<table><tbody>" + resp + "</tbody></table>", 2);
                    case "td":
                    case "th":
                        return parseHTML("<table><tbody><tr>" + resp + "</tr></tbody></table>", 3);
                    case "script":
                        return parseHTML("<div>" + resp + "</div>", 1);
                    default:
                        return parseHTML(resp, 0);
                }
            }
        }

        /**
         * @param {Function} func
         */
        function maybeCall(func){
            if(func) {
                func();
            }
        }

        /**
         * @param {any} o
         * @param {string} type
         * @returns
         */
        function isType(o, type) {
            return Object.prototype.toString.call(o) === "[object " + type + "]";
        }

        /**
         * @param {*} o
         * @returns {o is Function}
         */
        function isFunction(o) {
            return isType(o, "Function");
        }

        /**
         * @param {*} o
         * @returns {o is Object}
         */
        function isRawObject(o) {
            return isType(o, "Object");
        }

        /**
         * getInternalData retrieves "private" data stored by htmx within an element
         * @param {HTMLElement} elt
         * @returns {*}
         */
        function getInternalData(elt) {
            var dataProp = 'htmx-internal-data';
            var data = elt[dataProp];
            if (!data) {
                data = elt[dataProp] = {};
            }
            return data;
        }

        /**
         * toArray converts an ArrayLike object into a real array.
         * @param {ArrayLike} arr
         * @returns {any[]}
         */
        function toArray(arr) {
            var returnArr = [];
            if (arr) {
                for (var i = 0; i < arr.length; i++) {
                    returnArr.push(arr[i]);
                }
            }
            return returnArr
        }

        function forEach(arr, func) {
            if (arr) {
                for (var i = 0; i < arr.length; i++) {
                    func(arr[i]);
                }
            }
        }

        function isScrolledIntoView(el) {
            var rect = el.getBoundingClientRect();
            var elemTop = rect.top;
            var elemBottom = rect.bottom;
            return elemTop < window.innerHeight && elemBottom >= 0;
        }

	function bodyContains(elt) {
	    if (elt.getRootNode() instanceof ShadowRoot) {
		return getDocument().body.contains(elt.getRootNode().host);
	    } else {
		return getDocument().body.contains(elt);
	    }
	}

        function splitOnWhitespace(trigger) {
            return trigger.trim().split(/\s+/);
        }

        /**
         * mergeObjects takes all of the keys from
         * obj2 and duplicates them into obj1
         * @param {Object} obj1
         * @param {Object} obj2
         * @returns {Object}
         */
        function mergeObjects(obj1, obj2) {
            for (var key in obj2) {
                if (obj2.hasOwnProperty(key)) {
                    obj1[key] = obj2[key];
                }
            }
            return obj1;
        }

        function parseJSON(jString) {
            try {
                return JSON.parse(jString);
            } catch(error) {
                logError(error);
                return null;
            }
        }

        function canAccessLocalStorage() {
            var test = 'htmx:localStorageTest';
            try {
                localStorage.setItem(test, test);
                localStorage.removeItem(test);
                return true;
            } catch(e) {
                return false;
            }
        }

        //==========================================================================================
        // public API
        //==========================================================================================

        function internalEval(str){
            return maybeEval(getDocument().body, function () {
                return eval(str);
            });
        }

        function onLoadHelper(callback) {
            var value = htmx.on("htmx:load", function(evt) {
                callback(evt.detail.elt);
            });
            return value;
        }

        function logAll(){
            htmx.logger = function(elt, event, data) {
                if(console) {
                    console.log(event, elt, data);
                }
            }
        }

        function find(eltOrSelector, selector) {
            if (selector) {
                return eltOrSelector.querySelector(selector);
            } else {
                return find(getDocument(), eltOrSelector);
            }
        }

        function findAll(eltOrSelector, selector) {
            if (selector) {
                return eltOrSelector.querySelectorAll(selector);
            } else {
                return findAll(getDocument(), eltOrSelector);
            }
        }

        function removeElement(elt, delay) {
            elt = resolveTarget(elt);
            if (delay) {
                setTimeout(function(){removeElement(elt);}, delay)
            } else {
                elt.parentElement.removeChild(elt);
            }
        }

        function addClassToElement(elt, clazz, delay) {
            elt = resolveTarget(elt);
            if (delay) {
                setTimeout(function(){addClassToElement(elt, clazz);}, delay)
            } else {
                elt.classList && elt.classList.add(clazz);
            }
        }

        function removeClassFromElement(elt, clazz, delay) {
            elt = resolveTarget(elt);
            if (delay) {
                setTimeout(function(){removeClassFromElement(elt, clazz);}, delay)
            } else {
                if (elt.classList) {
                    elt.classList.remove(clazz);
                    // if there are no classes left, remove the class attribute
                    if (elt.classList.length === 0) {
                        elt.removeAttribute("class");
                    }
                }
            }
        }

        function toggleClassOnElement(elt, clazz) {
            elt = resolveTarget(elt);
            elt.classList.toggle(clazz);
        }

        function takeClassForElement(elt, clazz) {
            elt = resolveTarget(elt);
            forEach(elt.parentElement.children, function(child){
                removeClassFromElement(child, clazz);
            })
            addClassToElement(elt, clazz);
        }

        function closest(elt, selector) {
            elt = resolveTarget(elt);
            if (elt.closest) {
                return elt.closest(selector);
            } else {
                do{
                    if (elt == null || matches(elt, selector)){
                        return elt;
                    }
                }
                while (elt = elt && parentElt(elt));
            }
        }

        function querySelectorAllExt(elt, selector) {
            if (selector.indexOf("closest ") === 0) {
                return [closest(elt, selector.substr(8))];
            } else if (selector.indexOf("find ") === 0) {
                return [find(elt, selector.substr(5))];
            } else if (selector.indexOf("next ") === 0) {
                return [scanForwardQuery(elt, selector.substr(5))];
            } else if (selector.indexOf("previous ") === 0) {
                return [scanBackwardsQuery(elt, selector.substr(9))];
            } else if (selector === 'document') {
                return [document];
            } else if (selector === 'window') {
                return [window];
            } else {
                return getDocument().querySelectorAll(selector);
            }
        }

        var scanForwardQuery = function(start, match) {
            var results = getDocument().querySelectorAll(match);
            for (var i = 0; i < results.length; i++) {
                var elt = results[i];
                if (elt.compareDocumentPosition(start) === Node.DOCUMENT_POSITION_PRECEDING) {
                    return elt;
                }
            }
        }

        var scanBackwardsQuery = function(start, match) {
            var results = getDocument().querySelectorAll(match);
            for (var i = results.length - 1; i >= 0; i--) {
                var elt = results[i];
                if (elt.compareDocumentPosition(start) === Node.DOCUMENT_POSITION_FOLLOWING) {
                    return elt;
                }
            }
        }

        function querySelectorExt(eltOrSelector, selector) {
            if (selector) {
                return querySelectorAllExt(eltOrSelector, selector)[0];
            } else {
                return querySelectorAllExt(getDocument().body, eltOrSelector)[0];
            }
        }

        function resolveTarget(arg2) {
            if (isType(arg2, 'String')) {
                return find(arg2);
            } else {
                return arg2;
            }
        }

        function processEventArgs(arg1, arg2, arg3) {
            if (isFunction(arg2)) {
                return {
                    target: getDocument().body,
                    event: arg1,
                    listener: arg2
                }
            } else {
                return {
                    target: resolveTarget(arg1),
                    event: arg2,
                    listener: arg3
                }
            }

        }

        function addEventListenerImpl(arg1, arg2, arg3) {
            ready(function(){
                var eventArgs = processEventArgs(arg1, arg2, arg3);
                eventArgs.target.addEventListener(eventArgs.event, eventArgs.listener);
            })
            var b = isFunction(arg2);
            return b ? arg2 : arg3;
        }

        function removeEventListenerImpl(arg1, arg2, arg3) {
            ready(function(){
                var eventArgs = processEventArgs(arg1, arg2, arg3);
                eventArgs.target.removeEventListener(eventArgs.event, eventArgs.listener);
            })
            return isFunction(arg2) ? arg2 : arg3;
        }

        //====================================================================
        // Node processing
        //====================================================================

        var DUMMY_ELT = getDocument().createElement("output"); // dummy element for bad selectors
        function findAttributeTargets(elt, attrName) {
            var attrTarget = getClosestAttributeValue(elt, attrName);
            if (attrTarget) {
                if (attrTarget === "this") {
                    return [findThisElement(elt, attrName)];
                } else {
                    var result = querySelectorAllExt(elt, attrTarget);
                    if (result.length === 0) {
                        logError('The selector "' + attrTarget + '" on ' + attrName + " returned no matches!");
                        return [DUMMY_ELT]
                    } else {
                        return result;
                    }
                }
            }
        }

        function findThisElement(elt, attribute){
            return getClosestMatch(elt, function (elt) {
                return getAttributeValue(elt, attribute) != null;
            })
        }

        function getTarget(elt) {
            var targetStr = getClosestAttributeValue(elt, "hx-target");
            if (targetStr) {
                if (targetStr === "this") {
                    return findThisElement(elt,'hx-target');
                } else {
                    return querySelectorExt(elt, targetStr)
                }
            } else {
                var data = getInternalData(elt);
                if (data.boosted) {
                    return getDocument().body;
                } else {
                    return elt;
                }
            }
        }

        function shouldSettleAttribute(name) {
            var attributesToSettle = htmx.config.attributesToSettle;
            for (var i = 0; i < attributesToSettle.length; i++) {
                if (name === attributesToSettle[i]) {
                    return true;
                }
            }
            return false;
        }

        function cloneAttributes(mergeTo, mergeFrom) {
            forEach(mergeTo.attributes, function (attr) {
                if (!mergeFrom.hasAttribute(attr.name) && shouldSettleAttribute(attr.name)) {
                    mergeTo.removeAttribute(attr.name)
                }
            });
            forEach(mergeFrom.attributes, function (attr) {
                if (shouldSettleAttribute(attr.name)) {
                    mergeTo.setAttribute(attr.name, attr.value);
                }
            });
        }

        function isInlineSwap(swapStyle, target) {
            var extensions = getExtensions(target);
            for (var i = 0; i < extensions.length; i++) {
                var extension = extensions[i];
                try {
                    if (extension.isInlineSwap(swapStyle)) {
                        return true;
                    }
                } catch(e) {
                    logError(e);
                }
            }
            return swapStyle === "outerHTML";
        }

        /**
         *
         * @param {string} oobValue
         * @param {HTMLElement} oobElement
         * @param {*} settleInfo
         * @returns
         */
        function oobSwap(oobValue, oobElement, settleInfo) {
            var selector = "#" + oobElement.id;
            var swapStyle = "outerHTML";
            if (oobValue === "true") {
                // do nothing
            } else if (oobValue.indexOf(":") > 0) {
                swapStyle = oobValue.substr(0, oobValue.indexOf(":"));
                selector  = oobValue.substr(oobValue.indexOf(":") + 1, oobValue.length);
            } else {
                swapStyle = oobValue;
            }

            var targets = getDocument().querySelectorAll(selector);
            if (targets) {
                forEach(
                    targets,
                    function (target) {
                        var fragment;
                        var oobElementClone = oobElement.cloneNode(true);
                        fragment = getDocument().createDocumentFragment();
                        fragment.appendChild(oobElementClone);
                        if (!isInlineSwap(swapStyle, target)) {
                            fragment = oobElementClone; // if this is not an inline swap, we use the content of the node, not the node itself
                        }

                        var beforeSwapDetails = {shouldSwap: true, target: target, fragment:fragment };
                        if (!triggerEvent(target, 'htmx:oobBeforeSwap', beforeSwapDetails)) return;

                        target = beforeSwapDetails.target; // allow re-targeting
                        if (beforeSwapDetails['shouldSwap']){
                            swap(swapStyle, target, target, fragment, settleInfo);
                        }
                        forEach(settleInfo.elts, function (elt) {
                            triggerEvent(elt, 'htmx:oobAfterSwap', beforeSwapDetails);
                        });
                    }
                );
                oobElement.parentNode.removeChild(oobElement);
            } else {
                oobElement.parentNode.removeChild(oobElement);
                triggerErrorEvent(getDocument().body, "htmx:oobErrorNoTarget", {content: oobElement});
            }
            return oobValue;
        }

        function handleOutOfBandSwaps(elt, fragment, settleInfo) {
            var oobSelects = getClosestAttributeValue(elt, "hx-select-oob");
            if (oobSelects) {
                var oobSelectValues = oobSelects.split(",");
                for (let i = 0; i < oobSelectValues.length; i++) {
                    var oobSelectValue = oobSelectValues[i].split(":", 2);
                    var id = oobSelectValue[0];
                    if (id.indexOf("#") === 0) {
                        id = id.substring(1);
                    }
                    var oobValue = oobSelectValue[1] || "true";
                    var oobElement = fragment.querySelector("#" + id);
                    if (oobElement) {
                        oobSwap(oobValue, oobElement, settleInfo);
                    }
                }
            }
            forEach(findAll(fragment, '[hx-swap-oob], [data-hx-swap-oob]'), function (oobElement) {
                var oobValue = getAttributeValue(oobElement, "hx-swap-oob");
                if (oobValue != null) {
                    oobSwap(oobValue, oobElement, settleInfo);
                }
            });
        }

        function handlePreservedElements(fragment) {
            forEach(findAll(fragment, '[hx-preserve], [data-hx-preserve]'), function (preservedElt) {
                var id = getAttributeValue(preservedElt, "id");
                var oldElt = getDocument().getElementById(id);
                if (oldElt != null) {
                    preservedElt.parentNode.replaceChild(oldElt, preservedElt);
                }
            });
        }

        function handleAttributes(parentNode, fragment, settleInfo) {
            forEach(fragment.querySelectorAll("[id]"), function (newNode) {
                if (newNode.id && newNode.id.length > 0) {
                    var oldNode = parentNode.querySelector(newNode.tagName + "[id='" + newNode.id + "']");
                    if (oldNode && oldNode !== parentNode) {
                        var newAttributes = newNode.cloneNode();
                        cloneAttributes(newNode, oldNode);
                        settleInfo.tasks.push(function () {
                            cloneAttributes(newNode, newAttributes);
                        });
                    }
                }
            });
        }

        function makeAjaxLoadTask(child) {
            return function () {
                removeClassFromElement(child, htmx.config.addedClass);
                processNode(child);
                processScripts(child);
                processFocus(child)
                triggerEvent(child, 'htmx:load');
            };
        }

        function processFocus(child) {
            var autofocus = "[autofocus]";
            var autoFocusedElt = matches(child, autofocus) ? child : child.querySelector(autofocus)
            if (autoFocusedElt != null) {
                autoFocusedElt.focus();
            }
        }

        function insertNodesBefore(parentNode, insertBefore, fragment, settleInfo) {
            handleAttributes(parentNode, fragment, settleInfo);
            while(fragment.childNodes.length > 0){
                var child = fragment.firstChild;
                addClassToElement(child, htmx.config.addedClass);
                parentNode.insertBefore(child, insertBefore);
                if (child.nodeType !== Node.TEXT_NODE && child.nodeType !== Node.COMMENT_NODE) {
                    settleInfo.tasks.push(makeAjaxLoadTask(child));
                }
            }
        }

        function cleanUpElement(element) {
            var internalData = getInternalData(element);
            if (internalData.webSocket) {
                internalData.webSocket.close();
            }
            if (internalData.sseEventSource) {
                internalData.sseEventSource.close();
            }

            triggerEvent(element, "htmx:beforeCleanupElement")

            if (internalData.listenerInfos) {
                forEach(internalData.listenerInfos, function(info) {
                    if (element !== info.on) {
                        info.on.removeEventListener(info.trigger, info.listener);
                    }
                });
            }
            if (element.children) { // IE
                forEach(element.children, function(child) { cleanUpElement(child) });
            }
        }

        function swapOuterHTML(target, fragment, settleInfo) {
            if (target.tagName === "BODY") {
                return swapInnerHTML(target, fragment, settleInfo);
            } else {
                // @type {HTMLElement}
                var newElt
                var eltBeforeNewContent = target.previousSibling;
                insertNodesBefore(parentElt(target), target, fragment, settleInfo);
                if (eltBeforeNewContent == null) {
                    newElt = parentElt(target).firstChild;
                } else {
                    newElt = eltBeforeNewContent.nextSibling;
                }
                getInternalData(target).replacedWith = newElt; // tuck away so we can fire events on it later
                settleInfo.elts = [] // clear existing elements
                while(newElt && newElt !== target) {
                    if (newElt.nodeType === Node.ELEMENT_NODE) {
                        settleInfo.elts.push(newElt);
                    }
                    newElt = newElt.nextElementSibling;
                }
                cleanUpElement(target);
                parentElt(target).removeChild(target);
            }
        }

        function swapAfterBegin(target, fragment, settleInfo) {
            return insertNodesBefore(target, target.firstChild, fragment, settleInfo);
        }

        function swapBeforeBegin(target, fragment, settleInfo) {
            return insertNodesBefore(parentElt(target), target, fragment, settleInfo);
        }

        function swapBeforeEnd(target, fragment, settleInfo) {
            return insertNodesBefore(target, null, fragment, settleInfo);
        }

        function swapAfterEnd(target, fragment, settleInfo) {
            return insertNodesBefore(parentElt(target), target.nextSibling, fragment, settleInfo);
        }
        function swapDelete(target, fragment, settleInfo) {
            cleanUpElement(target);
            return parentElt(target).removeChild(target);
        }

        function swapInnerHTML(target, fragment, settleInfo) {
            var firstChild = target.firstChild;
            insertNodesBefore(target, firstChild, fragment, settleInfo);
            if (firstChild) {
                while (firstChild.nextSibling) {
                    cleanUpElement(firstChild.nextSibling)
                    target.removeChild(firstChild.nextSibling);
                }
                cleanUpElement(firstChild)
                target.removeChild(firstChild);
            }
        }

        function maybeSelectFromResponse(elt, fragment) {
            var selector = getClosestAttributeValue(elt, "hx-select");
            if (selector) {
                var newFragment = getDocument().createDocumentFragment();
                forEach(fragment.querySelectorAll(selector), function (node) {
                    newFragment.appendChild(node);
                });
                fragment = newFragment;
            }
            return fragment;
        }

        function swap(swapStyle, elt, target, fragment, settleInfo) {
            switch (swapStyle) {
                case "none":
                    return;
                case "outerHTML":
                    swapOuterHTML(target, fragment, settleInfo);
                    return;
                case "afterbegin":
                    swapAfterBegin(target, fragment, settleInfo);
                    return;
                case "beforebegin":
                    swapBeforeBegin(target, fragment, settleInfo);
                    return;
                case "beforeend":
                    swapBeforeEnd(target, fragment, settleInfo);
                    return;
                case "afterend":
                    swapAfterEnd(target, fragment, settleInfo);
                    return;
                case "delete":
                    swapDelete(target, fragment, settleInfo);
                    return;
                default:
                    var extensions = getExtensions(elt);
                    for (var i = 0; i < extensions.length; i++) {
                        var ext = extensions[i];
                        try {
                            var newElements = ext.handleSwap(swapStyle, target, fragment, settleInfo);
                            if (newElements) {
                                if (typeof newElements.length !== 'undefined') {
                                    // if handleSwap returns an array (like) of elements, we handle them
                                    for (var j = 0; j < newElements.length; j++) {
                                        var child = newElements[j];
                                        if (child.nodeType !== Node.TEXT_NODE && child.nodeType !== Node.COMMENT_NODE) {
                                            settleInfo.tasks.push(makeAjaxLoadTask(child));
                                        }
                                    }
                                }
                                return;
                            }
                        } catch (e) {
                            logError(e);
                        }
                    }
                    if (swapStyle === "innerHTML") {
                        swapInnerHTML(target, fragment, settleInfo);
                    } else {
                        swap(htmx.config.defaultSwapStyle, elt, target, fragment, settleInfo);
                    }
            }
        }

        function findTitle(content) {
            if (content.indexOf('<title') > -1) {
                var contentWithSvgsRemoved = content.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');
                var result = contentWithSvgsRemoved.match(/<title(\s[^>]*>|>)([\s\S]*?)<\/title>/im);

                if (result) {
                    return result[2];
                }
            }
        }

        function selectAndSwap(swapStyle, target, elt, responseText, settleInfo) {
            settleInfo.title = findTitle(responseText);
            var fragment = makeFragment(responseText);
            if (fragment) {
                handleOutOfBandSwaps(elt, fragment, settleInfo);
                fragment = maybeSelectFromResponse(elt, fragment);
                handlePreservedElements(fragment);
                return swap(swapStyle, elt, target, fragment, settleInfo);
            }
        }

        function handleTrigger(xhr, header, elt) {
            var triggerBody = xhr.getResponseHeader(header);
            if (triggerBody.indexOf("{") === 0) {
                var triggers = parseJSON(triggerBody);
                for (var eventName in triggers) {
                    if (triggers.hasOwnProperty(eventName)) {
                        var detail = triggers[eventName];
                        if (!isRawObject(detail)) {
                            detail = {"value": detail}
                        }
                        triggerEvent(elt, eventName, detail);
                    }
                }
            } else {
                triggerEvent(elt, triggerBody, []);
            }
        }

        var WHITESPACE = /\s/;
        var WHITESPACE_OR_COMMA = /[\s,]/;
        var SYMBOL_START = /[_$a-zA-Z]/;
        var SYMBOL_CONT = /[_$a-zA-Z0-9]/;
        var STRINGISH_START = ['"', "'", "/"];
        var NOT_WHITESPACE = /[^\s]/;
        function tokenizeString(str) {
            var tokens = [];
            var position = 0;
            while (position < str.length) {
                if(SYMBOL_START.exec(str.charAt(position))) {
                    var startPosition = position;
                    while (SYMBOL_CONT.exec(str.charAt(position + 1))) {
                        position++;
                    }
                    tokens.push(str.substr(startPosition, position - startPosition + 1));
                } else if (STRINGISH_START.indexOf(str.charAt(position)) !== -1) {
                    var startChar = str.charAt(position);
                    var startPosition = position;
                    position++;
                    while (position < str.length && str.charAt(position) !== startChar ) {
                        if (str.charAt(position) === "\\") {
                            position++;
                        }
                        position++;
                    }
                    tokens.push(str.substr(startPosition, position - startPosition + 1));
                } else {
                    var symbol = str.charAt(position);
                    tokens.push(symbol);
                }
                position++;
            }
            return tokens;
        }

        function isPossibleRelativeReference(token, last, paramName) {
            return SYMBOL_START.exec(token.charAt(0)) &&
                token !== "true" &&
                token !== "false" &&
                token !== "this" &&
                token !== paramName &&
                last !== ".";
        }

        function maybeGenerateConditional(elt, tokens, paramName) {
            if (tokens[0] === '[') {
                tokens.shift();
                var bracketCount = 1;
                var conditionalSource = " return (function(" + paramName + "){ return (";
                var last = null;
                while (tokens.length > 0) {
                    var token = tokens[0];
                    if (token === "]") {
                        bracketCount--;
                        if (bracketCount === 0) {
                            if (last === null) {
                                conditionalSource = conditionalSource + "true";
                            }
                            tokens.shift();
                            conditionalSource += ")})";
                            try {
                                var conditionFunction = maybeEval(elt,function () {
                                    return Function(conditionalSource)();
                                    },
                                    function(){return true})
                                conditionFunction.source = conditionalSource;
                                return conditionFunction;
                            } catch (e) {
                                triggerErrorEvent(getDocument().body, "htmx:syntax:error", {error:e, source:conditionalSource})
                                return null;
                            }
                        }
                    } else if (token === "[") {
                        bracketCount++;
                    }
                    if (isPossibleRelativeReference(token, last, paramName)) {
                            conditionalSource += "((" + paramName + "." + token + ") ? (" + paramName + "." + token + ") : (window." + token + "))";
                    } else {
                        conditionalSource = conditionalSource + token;
                    }
                    last = tokens.shift();
                }
            }
        }

        function consumeUntil(tokens, match) {
            var result = "";
            while (tokens.length > 0 && !tokens[0].match(match)) {
                result += tokens.shift();
            }
            return result;
        }

        var INPUT_SELECTOR = 'input, textarea, select';

        /**
         * @param {HTMLElement} elt
         * @returns {import("./htmx").HtmxTriggerSpecification[]}
         */
        function getTriggerSpecs(elt) {
            var explicitTrigger = getAttributeValue(elt, 'hx-trigger');
            var triggerSpecs = [];
            if (explicitTrigger) {
                var tokens = tokenizeString(explicitTrigger);
                do {
                    consumeUntil(tokens, NOT_WHITESPACE);
                    var initialLength = tokens.length;
                    var trigger = consumeUntil(tokens, /[,\[\s]/);
                    if (trigger !== "") {
                        if (trigger === "every") {
                            var every = {trigger: 'every'};
                            consumeUntil(tokens, NOT_WHITESPACE);
                            every.pollInterval = parseInterval(consumeUntil(tokens, /[,\[\s]/));
                            consumeUntil(tokens, NOT_WHITESPACE);
                            var eventFilter = maybeGenerateConditional(elt, tokens, "event");
                            if (eventFilter) {
                                every.eventFilter = eventFilter;
                            }
                            triggerSpecs.push(every);
                        } else if (trigger.indexOf("sse:") === 0) {
                            triggerSpecs.push({trigger: 'sse', sseEvent: trigger.substr(4)});
                        } else {
                            var triggerSpec = {trigger: trigger};
                            var eventFilter = maybeGenerateConditional(elt, tokens, "event");
                            if (eventFilter) {
                                triggerSpec.eventFilter = eventFilter;
                            }
                            while (tokens.length > 0 && tokens[0] !== ",") {
                                consumeUntil(tokens, NOT_WHITESPACE)
                                var token = tokens.shift();
                                if (token === "changed") {
                                    triggerSpec.changed = true;
                                } else if (token === "once") {
                                    triggerSpec.once = true;
                                } else if (token === "consume") {
                                    triggerSpec.consume = true;
                                } else if (token === "delay" && tokens[0] === ":") {
                                    tokens.shift();
                                    triggerSpec.delay = parseInterval(consumeUntil(tokens, WHITESPACE_OR_COMMA));
                                } else if (token === "from" && tokens[0] === ":") {
                                    tokens.shift();
                                    var from_arg = consumeUntil(tokens, WHITESPACE_OR_COMMA);
                                    if (from_arg === "closest" || from_arg === "find" || from_arg === "next" || from_arg === "previous") {
                                        tokens.shift();
                                        from_arg +=
                                            " " +
                                            consumeUntil(
                                                tokens,
                                                WHITESPACE_OR_COMMA
                                            );
                                    }
                                    triggerSpec.from = from_arg;
                                } else if (token === "target" && tokens[0] === ":") {
                                    tokens.shift();
                                    triggerSpec.target = consumeUntil(tokens, WHITESPACE_OR_COMMA);
                                } else if (token === "throttle" && tokens[0] === ":") {
                                    tokens.shift();
                                    triggerSpec.throttle = parseInterval(consumeUntil(tokens, WHITESPACE_OR_COMMA));
                                } else if (token === "queue" && tokens[0] === ":") {
                                    tokens.shift();
                                    triggerSpec.queue = consumeUntil(tokens, WHITESPACE_OR_COMMA);
                                } else if ((token === "root" || token === "threshold") && tokens[0] === ":") {
                                    tokens.shift();
                                    triggerSpec[token] = consumeUntil(tokens, WHITESPACE_OR_COMMA);
                                } else {
                                    triggerErrorEvent(elt, "htmx:syntax:error", {token:tokens.shift()});
                                }
                            }
                            triggerSpecs.push(triggerSpec);
                        }
                    }
                    if (tokens.length === initialLength) {
                        triggerErrorEvent(elt, "htmx:syntax:error", {token:tokens.shift()});
                    }
                    consumeUntil(tokens, NOT_WHITESPACE);
                } while (tokens[0] === "," && tokens.shift())
            }

            if (triggerSpecs.length > 0) {
                return triggerSpecs;
            } else if (matches(elt, 'form')) {
                return [{trigger: 'submit'}];
            } else if (matches(elt, 'input[type="button"]')){
                return [{trigger: 'click'}];
            } else if (matches(elt, INPUT_SELECTOR)) {
                return [{trigger: 'change'}];
            } else {
                return [{trigger: 'click'}];
            }
        }

        function cancelPolling(elt) {
            getInternalData(elt).cancelled = true;
        }

        function processPolling(elt, handler, spec) {
            var nodeData = getInternalData(elt);
            nodeData.timeout = setTimeout(function () {
                if (bodyContains(elt) && nodeData.cancelled !== true) {
                    if (!maybeFilterEvent(spec, makeEvent('hx:poll:trigger', {triggerSpec:spec, target:elt}))) {
                        handler(elt);
                    }
                    processPolling(elt, handler, spec);
                }
            }, spec.pollInterval);
        }

        function isLocalLink(elt) {
            return location.hostname === elt.hostname &&
                getRawAttribute(elt,'href') &&
                getRawAttribute(elt,'href').indexOf("#") !== 0;
        }

        function boostElement(elt, nodeData, triggerSpecs) {
            if ((elt.tagName === "A" && isLocalLink(elt) && (elt.target === "" || elt.target === "_self")) || elt.tagName === "FORM") {
                nodeData.boosted = true;
                var verb, path;
                if (elt.tagName === "A") {
                    verb = "get";
                    path = getRawAttribute(elt, 'href');
                } else {
                    var rawAttribute = getRawAttribute(elt, "method");
                    verb = rawAttribute ? rawAttribute.toLowerCase() : "get";
                    if (verb === "get") {
                    }
                    path = getRawAttribute(elt, 'action');
                }
                triggerSpecs.forEach(function(triggerSpec) {
                    addEventListener(elt, function(evt) {
                        issueAjaxRequest(verb, path, elt, evt)
                    }, nodeData, triggerSpec, true);
                });
            }
        }

        /**
         *
         * @param {Event} evt
         * @param {HTMLElement} elt
         * @returns
         */
        function shouldCancel(evt, elt) {
            if (evt.type === "submit" || evt.type === "click") {
                if (elt.tagName === "FORM") {
                    return true;
                }
                if (matches(elt, 'input[type="submit"], button') && closest(elt, 'form') !== null) {
                    return true;
                }
                if (elt.tagName === "A" && elt.href &&
                    (elt.getAttribute('href') === '#' || elt.getAttribute('href').indexOf("#") !== 0)) {
                    return true;
                }
            }
            return false;
        }

        function ignoreBoostedAnchorCtrlClick(elt, evt) {
            return getInternalData(elt).boosted && elt.tagName === "A" && evt.type === "click" && (evt.ctrlKey || evt.metaKey);
        }

        function maybeFilterEvent(triggerSpec, evt) {
            var eventFilter = triggerSpec.eventFilter;
            if(eventFilter){
                try {
                    return eventFilter(evt) !== true;
                } catch(e) {
                    triggerErrorEvent(getDocument().body, "htmx:eventFilter:error", {error: e, source:eventFilter.source});
                    return true;
                }
            }
            return false;
        }

        function addEventListener(elt, handler, nodeData, triggerSpec, explicitCancel) {
            var eltsToListenOn;
            if (triggerSpec.from) {
                eltsToListenOn = querySelectorAllExt(elt, triggerSpec.from);
            } else {
                eltsToListenOn = [elt];
            }
            forEach(eltsToListenOn, function (eltToListenOn) {
                var eventListener = function (evt) {
                    if (!bodyContains(elt)) {
                        eltToListenOn.removeEventListener(triggerSpec.trigger, eventListener);
                        return;
                    }
                    if (ignoreBoostedAnchorCtrlClick(elt, evt)) {
                        return;
                    }
                    if (explicitCancel || shouldCancel(evt, elt)) {
                        evt.preventDefault();
                    }
                    if (maybeFilterEvent(triggerSpec, evt)) {
                        return;
                    }
                    var eventData = getInternalData(evt);
                    eventData.triggerSpec = triggerSpec;
                    if (eventData.handledFor == null) {
                        eventData.handledFor = [];
                    }
                    var elementData = getInternalData(elt);
                    if (eventData.handledFor.indexOf(elt) < 0) {
                        eventData.handledFor.push(elt);
                        if (triggerSpec.consume) {
                            evt.stopPropagation();
                        }
                        if (triggerSpec.target && evt.target) {
                            if (!matches(evt.target, triggerSpec.target)) {
                                return;
                            }
                        }
                        if (triggerSpec.once) {
                            if (elementData.triggeredOnce) {
                                return;
                            } else {
                                elementData.triggeredOnce = true;
                            }
                        }
                        if (triggerSpec.changed) {
                            if (elementData.lastValue === elt.value) {
                                return;
                            } else {
                                elementData.lastValue = elt.value;
                            }
                        }
                        if (elementData.delayed) {
                            clearTimeout(elementData.delayed);
                        }
                        if (elementData.throttle) {
                            return;
                        }

                        if (triggerSpec.throttle) {
                            if (!elementData.throttle) {
                                handler(elt, evt);
                                elementData.throttle = setTimeout(function () {
                                    elementData.throttle = null;
                                }, triggerSpec.throttle);
                            }
                        } else if (triggerSpec.delay) {
                            elementData.delayed = setTimeout(function() { handler(elt, evt) }, triggerSpec.delay);
                        } else {
                            handler(elt, evt);
                        }
                    }
                };
                if (nodeData.listenerInfos == null) {
                    nodeData.listenerInfos = [];
                }
                nodeData.listenerInfos.push({
                    trigger: triggerSpec.trigger,
                    listener: eventListener,
                    on: eltToListenOn
                })
                eltToListenOn.addEventListener(triggerSpec.trigger, eventListener);
            })
        }

        var windowIsScrolling = false // used by initScrollHandler
        var scrollHandler = null;
        function initScrollHandler() {
            if (!scrollHandler) {
                scrollHandler = function() {
                    windowIsScrolling = true
                };
                window.addEventListener("scroll", scrollHandler)
                setInterval(function() {
                    if (windowIsScrolling) {
                        windowIsScrolling = false;
                        forEach(getDocument().querySelectorAll("[hx-trigger='revealed'],[data-hx-trigger='revealed']"), function (elt) {
                            maybeReveal(elt);
                        })
                    }
                }, 200);
            }
        }

        function maybeReveal(elt) {
            if (!hasAttribute(elt,'data-hx-revealed') && isScrolledIntoView(elt)) {
                elt.setAttribute('data-hx-revealed', 'true');
                var nodeData = getInternalData(elt);
                if (nodeData.initialized) {
                    triggerEvent(elt, 'revealed');
                } else {
                    // if the node isn't initialized, wait for it before triggering the request
                    elt.addEventListener("htmx:afterProcessNode", function(evt) { triggerEvent(elt, 'revealed') }, {once: true});
                }
            }
        }

        //====================================================================
        // Web Sockets
        //====================================================================

        function processWebSocketInfo(elt, nodeData, info) {
            var values = splitOnWhitespace(info);
            for (var i = 0; i < values.length; i++) {
                var value = values[i].split(/:(.+)/);
                if (value[0] === "connect") {
                    ensureWebSocket(elt, value[1], 0);
                }
                if (value[0] === "send") {
                    processWebSocketSend(elt);
                }
            }
        }

        function ensureWebSocket(elt, wssSource, retryCount) {
            if (!bodyContains(elt)) {
                return;  // stop ensuring websocket connection when socket bearing element ceases to exist
            }

            if (wssSource.indexOf("/") == 0) {  // complete absolute paths only
                var base_part = location.hostname + (location.port ? ':'+location.port: '');
                if (location.protocol == 'https:') {
                    wssSource = "wss://" + base_part + wssSource;
                } else if (location.protocol == 'http:') {
                    wssSource = "ws://" + base_part + wssSource;
                }
            }
            var socket = htmx.createWebSocket(wssSource);
            socket.onerror = function (e) {
                triggerErrorEvent(elt, "htmx:wsError", {error:e, socket:socket});
                maybeCloseWebSocketSource(elt);
            };

            socket.onclose = function (e) {
                if ([1006, 1012, 1013].indexOf(e.code) >= 0) {  // Abnormal Closure/Service Restart/Try Again Later
                    var delay = getWebSocketReconnectDelay(retryCount);
                    setTimeout(function() {
                        ensureWebSocket(elt, wssSource, retryCount+1);  // creates a websocket with a new timeout
                    }, delay);
                }
            };
            socket.onopen = function (e) {
                retryCount = 0;
            }

            getInternalData(elt).webSocket = socket;
            socket.addEventListener('message', function (event) {
                if (maybeCloseWebSocketSource(elt)) {
                    return;
                }

                var response = event.data;
                withExtensions(elt, function(extension){
                    response = extension.transformResponse(response, null, elt);
                });

                var settleInfo = makeSettleInfo(elt);
                var fragment = makeFragment(response);
                var children = toArray(fragment.children);
                for (var i = 0; i < children.length; i++) {
                    var child = children[i];
                    oobSwap(getAttributeValue(child, "hx-swap-oob") || "true", child, settleInfo);
                }

                settleImmediately(settleInfo.tasks);
            });
        }

        function maybeCloseWebSocketSource(elt) {
            if (!bodyContains(elt)) {
                getInternalData(elt).webSocket.close();
                return true;
            }
        }

        function processWebSocketSend(elt) {
            var webSocketSourceElt = getClosestMatch(elt, function (parent) {
                return getInternalData(parent).webSocket != null;
            });
            if (webSocketSourceElt) {
                elt.addEventListener(getTriggerSpecs(elt)[0].trigger, function (evt) {
                    var webSocket = getInternalData(webSocketSourceElt).webSocket;
                    var headers = getHeaders(elt, webSocketSourceElt);
                    var results = getInputValues(elt, 'post');
                    var errors = results.errors;
                    var rawParameters = results.values;
                    var expressionVars = getExpressionVars(elt);
                    var allParameters = mergeObjects(rawParameters, expressionVars);
                    var filteredParameters = filterValues(allParameters, elt);
                    filteredParameters['HEADERS'] = headers;
                    if (errors && errors.length > 0) {
                        triggerEvent(elt, 'htmx:validation:halted', errors);
                        return;
                    }
                    webSocket.send(JSON.stringify(filteredParameters));
                    if(shouldCancel(evt, elt)){
                        evt.preventDefault();
                    }
                });
            } else {
                triggerErrorEvent(elt, "htmx:noWebSocketSourceError");
            }
        }

        function getWebSocketReconnectDelay(retryCount) {
            var delay = htmx.config.wsReconnectDelay;
            if (typeof delay === 'function') {
                // @ts-ignore
                return delay(retryCount);
            }
            if (delay === 'full-jitter') {
                var exp = Math.min(retryCount, 6);
                var maxDelay = 1000 * Math.pow(2, exp);
                return maxDelay * Math.random();
            }
            logError('htmx.config.wsReconnectDelay must either be a function or the string "full-jitter"');
        }

        //====================================================================
        // Server Sent Events
        //====================================================================

        function processSSEInfo(elt, nodeData, info) {
            var values = splitOnWhitespace(info);
            for (var i = 0; i < values.length; i++) {
                var value = values[i].split(/:(.+)/);
                if (value[0] === "connect") {
                    processSSESource(elt, value[1]);
                }

                if ((value[0] === "swap")) {
                    processSSESwap(elt, value[1])
                }
            }
        }

        function processSSESource(elt, sseSrc) {
            var source = htmx.createEventSource(sseSrc);
            source.onerror = function (e) {
                triggerErrorEvent(elt, "htmx:sseError", {error:e, source:source});
                maybeCloseSSESource(elt);
            };
            getInternalData(elt).sseEventSource = source;
        }

        function processSSESwap(elt, sseEventName) {
            var sseSourceElt = getClosestMatch(elt, hasEventSource);
            if (sseSourceElt) {
                var sseEventSource = getInternalData(sseSourceElt).sseEventSource;
                var sseListener = function (event) {
                    if (maybeCloseSSESource(sseSourceElt)) {
                        sseEventSource.removeEventListener(sseEventName, sseListener);
                        return;
                    }

                    ///////////////////////////
                    // TODO: merge this code with AJAX and WebSockets code in the future.

                    var response = event.data;
                    withExtensions(elt, function(extension){
                        response = extension.transformResponse(response, null, elt);
                    });

                    var swapSpec = getSwapSpecification(elt)
                    var target = getTarget(elt)
                    var settleInfo = makeSettleInfo(elt);

                    selectAndSwap(swapSpec.swapStyle, elt, target, response, settleInfo)
                    settleImmediately(settleInfo.tasks)
                    triggerEvent(elt, "htmx:sseMessage", event)
                };

                getInternalData(elt).sseListener = sseListener;
                sseEventSource.addEventListener(sseEventName, sseListener);
            } else {
                triggerErrorEvent(elt, "htmx:noSSESourceError");
            }
        }

        function processSSETrigger(elt, handler, sseEventName) {
            var sseSourceElt = getClosestMatch(elt, hasEventSource);
            if (sseSourceElt) {
                var sseEventSource = getInternalData(sseSourceElt).sseEventSource;
                var sseListener = function () {
                    if (!maybeCloseSSESource(sseSourceElt)) {
                        if (bodyContains(elt)) {
                            handler(elt);
                        } else {
                            sseEventSource.removeEventListener(sseEventName, sseListener);
                        }
                    }
                };
                getInternalData(elt).sseListener = sseListener;
                sseEventSource.addEventListener(sseEventName, sseListener);
            } else {
                triggerErrorEvent(elt, "htmx:noSSESourceError");
            }
        }

        function maybeCloseSSESource(elt) {
            if (!bodyContains(elt)) {
                getInternalData(elt).sseEventSource.close();
                return true;
            }
        }

        function hasEventSource(node) {
            return getInternalData(node).sseEventSource != null;
        }

        //====================================================================

        function loadImmediately(elt, handler, nodeData, delay) {
            var load = function(){
                if (!nodeData.loaded) {
                    nodeData.loaded = true;
                    handler(elt);
                }
            }
            if (delay) {
                setTimeout(load, delay);
            } else {
                load();
            }
        }

        function processVerbs(elt, nodeData, triggerSpecs) {
            var explicitAction = false;
            forEach(VERBS, function (verb) {
                if (hasAttribute(elt,'hx-' + verb)) {
                    var path = getAttributeValue(elt, 'hx-' + verb);
                    explicitAction = true;
                    nodeData.path = path;
                    nodeData.verb = verb;
                    triggerSpecs.forEach(function(triggerSpec) {
                        addTriggerHandler(elt, triggerSpec, nodeData, function (elt, evt) {
                            issueAjaxRequest(verb, path, elt, evt)
                        })
                    });
                }
            });
            return explicitAction;
        }

        function addTriggerHandler(elt, triggerSpec, nodeData, handler) {
            if (triggerSpec.sseEvent) {
                processSSETrigger(elt, handler, triggerSpec.sseEvent);
            } else if (triggerSpec.trigger === "revealed") {
                initScrollHandler();
                addEventListener(elt, handler, nodeData, triggerSpec);
                maybeReveal(elt);
            } else if (triggerSpec.trigger === "intersect") {
                var observerOptions = {};
                if (triggerSpec.root) {
                    observerOptions.root = querySelectorExt(elt, triggerSpec.root)
                }
                if (triggerSpec.threshold) {
                    observerOptions.threshold = parseFloat(triggerSpec.threshold);
                }
                var observer = new IntersectionObserver(function (entries) {
                    for (var i = 0; i < entries.length; i++) {
                        var entry = entries[i];
                        if (entry.isIntersecting) {
                            triggerEvent(elt, "intersect");
                            break;
                        }
                    }
                }, observerOptions);
                observer.observe(elt);
                addEventListener(elt, handler, nodeData, triggerSpec);
            } else if (triggerSpec.trigger === "load") {
                if (!maybeFilterEvent(triggerSpec, makeEvent("load", {elt:elt}))) {
                                loadImmediately(elt, handler, nodeData, triggerSpec.delay);
                            }
            } else if (triggerSpec.pollInterval) {
                nodeData.polling = true;
                processPolling(elt, handler, triggerSpec);
            } else {
                addEventListener(elt, handler, nodeData, triggerSpec);
            }
        }

        function evalScript(script) {
            if (script.type === "text/javascript" || script.type === "module" || script.type === "") {
                var newScript = getDocument().createElement("script");
                forEach(script.attributes, function (attr) {
                    newScript.setAttribute(attr.name, attr.value);
                });
                newScript.textContent = script.textContent;
                newScript.async = false;
                if (htmx.config.inlineScriptNonce) {
                    newScript.nonce = htmx.config.inlineScriptNonce;
                }
                var parent = script.parentElement;

                try {
                    parent.insertBefore(newScript, script);
                } catch (e) {
                    logError(e);
                } finally {
                    parent.removeChild(script);
                }
            }
        }

        function processScripts(elt) {
            if (matches(elt, "script")) {
                evalScript(elt);
            }
            forEach(findAll(elt, "script"), function (script) {
                evalScript(script);
            });
        }

        function hasChanceOfBeingBoosted() {
            return document.querySelector("[hx-boost], [data-hx-boost]");
        }

        function findElementsToProcess(elt) {
            if (elt.querySelectorAll) {
                var boostedElts = hasChanceOfBeingBoosted() ? ", a, form" : "";
                var results = elt.querySelectorAll(VERB_SELECTOR + boostedElts + ", [hx-sse], [data-hx-sse], [hx-ws]," +
                    " [data-hx-ws], [hx-ext], [hx-data-ext]");
                return results;
            } else {
                return [];
            }
        }

        function initButtonTracking(form){
            var maybeSetLastButtonClicked = function(evt){
                if (matches(evt.target, "button, input[type='submit']")) {
                    var internalData = getInternalData(form);
                    internalData.lastButtonClicked = evt.target;
                }
            };

            // need to handle both click and focus in:
            //   focusin - in case someone tabs in to a button and hits the space bar
            //   click - on OSX buttons do not focus on click see https://bugs.webkit.org/show_bug.cgi?id=13724

            form.addEventListener('click', maybeSetLastButtonClicked)
            form.addEventListener('focusin', maybeSetLastButtonClicked)
            form.addEventListener('focusout', function(evt){
                var internalData = getInternalData(form);
                internalData.lastButtonClicked = null;
            })
        }

        function initNode(elt) {
            if (elt.closest && elt.closest(htmx.config.disableSelector)) {
                return;
            }
            var nodeData = getInternalData(elt);
            if (!nodeData.initialized) {
                nodeData.initialized = true;
                triggerEvent(elt, "htmx:beforeProcessNode")

                if (elt.value) {
                    nodeData.lastValue = elt.value;
                }

                var triggerSpecs = getTriggerSpecs(elt);
                var explicitAction = processVerbs(elt, nodeData, triggerSpecs);

                if (!explicitAction && getClosestAttributeValue(elt, "hx-boost") === "true") {
                    boostElement(elt, nodeData, triggerSpecs);
                }

                if (elt.tagName === "FORM") {
                    initButtonTracking(elt);
                }

                var sseInfo = getAttributeValue(elt, 'hx-sse');
                if (sseInfo) {
                    processSSEInfo(elt, nodeData, sseInfo);
                }

                var wsInfo = getAttributeValue(elt, 'hx-ws');
                if (wsInfo) {
                    processWebSocketInfo(elt, nodeData, wsInfo);
                }
                triggerEvent(elt, "htmx:afterProcessNode");
            }
        }

        function processNode(elt) {
            elt = resolveTarget(elt);
            initNode(elt);
            forEach(findElementsToProcess(elt), function(child) { initNode(child) });
        }

        //====================================================================
        // Event/Log Support
        //====================================================================

        function kebabEventName(str) {
            return str.replace(/([a-z0-9])([A-Z])/g, '$1-$2').toLowerCase();
        }

        function makeEvent(eventName, detail) {
            var evt;
            if (window.CustomEvent && typeof window.CustomEvent === 'function') {
                evt = new CustomEvent(eventName, {bubbles: true, cancelable: true, detail: detail});
            } else {
                evt = getDocument().createEvent('CustomEvent');
                evt.initCustomEvent(eventName, true, true, detail);
            }
            return evt;
        }

        function triggerErrorEvent(elt, eventName, detail) {
            triggerEvent(elt, eventName, mergeObjects({error:eventName}, detail));
        }

        function ignoreEventForLogging(eventName) {
            return eventName === "htmx:afterProcessNode"
        }

        /**
         * `withExtensions` locates all active extensions for a provided element, then
         * executes the provided function using each of the active extensions.  It should
         * be called internally at every extendable execution point in htmx.
         *
         * @param {HTMLElement} elt
         * @param {(extension:import("./htmx").HtmxExtension) => void} toDo
         * @returns void
         */
        function withExtensions(elt, toDo) {
            forEach(getExtensions(elt), function(extension){
                try {
                    toDo(extension);
                } catch (e) {
                    logError(e);
                }
            });
        }

        function logError(msg) {
            if(console.error) {
                console.error(msg);
            } else if (console.log) {
                console.log("ERROR: ", msg);
            }
        }

        function triggerEvent(elt, eventName, detail) {
            elt = resolveTarget(elt);
            if (detail == null) {
                detail = {};
            }
            detail["elt"] = elt;
            var event = makeEvent(eventName, detail);
            if (htmx.logger && !ignoreEventForLogging(eventName)) {
                htmx.logger(elt, eventName, detail);
            }
            if (detail.error) {
                logError(detail.error);
                triggerEvent(elt, "htmx:error", {errorInfo:detail})
            }
            var eventResult = elt.dispatchEvent(event);
            var kebabName = kebabEventName(eventName);
            if (eventResult && kebabName !== eventName) {
                var kebabedEvent = makeEvent(kebabName, event.detail);
                eventResult = eventResult && elt.dispatchEvent(kebabedEvent)
            }
            withExtensions(elt, function (extension) {
                eventResult = eventResult && (extension.onEvent(eventName, event) !== false)
            });
            return eventResult;
        }

        //====================================================================
        // History Support
        //====================================================================
        var currentPathForHistory = location.pathname+location.search;

        function getHistoryElement() {
            var historyElt = getDocument().querySelector('[hx-history-elt],[data-hx-history-elt]');
            return historyElt || getDocument().body;
        }

        function saveToHistoryCache(url, content, title, scroll) {
            if (!canAccessLocalStorage()) {
                return;
            }

            var historyCache = parseJSON(localStorage.getItem("htmx-history-cache")) || [];
            for (var i = 0; i < historyCache.length; i++) {
                if (historyCache[i].url === url) {
                    historyCache.splice(i, 1);
                    break;
                }
            }
            historyCache.push({url:url, content: content, title:title, scroll:scroll})
            while (historyCache.length > htmx.config.historyCacheSize) {
                historyCache.shift();
            }
            while(historyCache.length > 0){
                try {
                    localStorage.setItem("htmx-history-cache", JSON.stringify(historyCache));
                    break;
                } catch (e) {
                    triggerErrorEvent(getDocument().body, "htmx:historyCacheError", {cause:e, cache: historyCache})
                    historyCache.shift(); // shrink the cache and retry
                }
            }
        }

        function getCachedHistory(url) {
            if (!canAccessLocalStorage()) {
                return null;
            }

            var historyCache = parseJSON(localStorage.getItem("htmx-history-cache")) || [];
            for (var i = 0; i < historyCache.length; i++) {
                if (historyCache[i].url === url) {
                    return historyCache[i];
                }
            }
            return null;
        }

        function cleanInnerHtmlForHistory(elt) {
            var className = htmx.config.requestClass;
            var clone = elt.cloneNode(true);
            forEach(findAll(clone, "." + className), function(child){
                removeClassFromElement(child, className);
            });
            return clone.innerHTML;
        }

        function saveCurrentPageToHistory() {
            var elt = getHistoryElement();
            var path = currentPathForHistory || location.pathname+location.search;
            triggerEvent(getDocument().body, "htmx:beforeHistorySave", {path:path, historyElt:elt});
            if(htmx.config.historyEnabled) history.replaceState({htmx:true}, getDocument().title, window.location.href);
            saveToHistoryCache(path, cleanInnerHtmlForHistory(elt), getDocument().title, window.scrollY);
        }

        function pushUrlIntoHistory(path) {
            if(htmx.config.historyEnabled)  history.pushState({htmx:true}, "", path);
            currentPathForHistory = path;
        }

        function replaceUrlInHistory(path) {
            if(htmx.config.historyEnabled)  history.replaceState({htmx:true}, "", path);
            currentPathForHistory = path;
        }

        function settleImmediately(tasks) {
            forEach(tasks, function (task) {
                task.call();
            });
        }

        function loadHistoryFromServer(path) {
            var request = new XMLHttpRequest();
            var details = {path: path, xhr:request};
            triggerEvent(getDocument().body, "htmx:historyCacheMiss", details);
            request.open('GET', path, true);
            request.setRequestHeader("HX-History-Restore-Request", "true");
            request.onload = function () {
                if (this.status >= 200 && this.status < 400) {
                    triggerEvent(getDocument().body, "htmx:historyCacheMissLoad", details);
                    var fragment = makeFragment(this.response);
                    // @ts-ignore
                    fragment = fragment.querySelector('[hx-history-elt],[data-hx-history-elt]') || fragment;
                    var historyElement = getHistoryElement();
                    var settleInfo = makeSettleInfo(historyElement);
                    // @ts-ignore
                    swapInnerHTML(historyElement, fragment, settleInfo)
                    settleImmediately(settleInfo.tasks);
                    currentPathForHistory = path;
                    triggerEvent(getDocument().body, "htmx:historyRestore", {path:path});
                } else {
                    triggerErrorEvent(getDocument().body, "htmx:historyCacheMissLoadError", details);
                }
            };
            request.send();
        }

        function restoreHistory(path) {
            saveCurrentPageToHistory();
            path = path || location.pathname+location.search;
            var cached = getCachedHistory(path);
            if (cached) {
                var fragment = makeFragment(cached.content);
                var historyElement = getHistoryElement();
                var settleInfo = makeSettleInfo(historyElement);
                swapInnerHTML(historyElement, fragment, settleInfo)
                settleImmediately(settleInfo.tasks);
                document.title = cached.title;
                window.scrollTo(0, cached.scroll);
                currentPathForHistory = path;
                triggerEvent(getDocument().body, "htmx:historyRestore", {path:path});
            } else {
                if (htmx.config.refreshOnHistoryMiss) {

                    // @ts-ignore: optional parameter in reload() function throws error
                    window.location.reload(true);
                } else {
                    loadHistoryFromServer(path);
                }
            }
        }

        function addRequestIndicatorClasses(elt) {
            var indicators = findAttributeTargets(elt, 'hx-indicator');
            if (indicators == null) {
                indicators = [elt];
            }
            forEach(indicators, function (ic) {
                ic.classList["add"].call(ic.classList, htmx.config.requestClass);
            });
            return indicators;
        }

        function removeRequestIndicatorClasses(indicators) {
            forEach(indicators, function (ic) {
                ic.classList["remove"].call(ic.classList, htmx.config.requestClass);
            });
        }

        //====================================================================
        // Input Value Processing
        //====================================================================

        function haveSeenNode(processed, elt) {
            for (var i = 0; i < processed.length; i++) {
                var node = processed[i];
                if (node.isSameNode(elt)) {
                    return true;
                }
            }
            return false;
        }

        function shouldInclude(elt) {
            if(elt.name === "" || elt.name == null || elt.disabled) {
                return false;
            }
            // ignore "submitter" types (see jQuery src/serialize.js)
            if (elt.type === "button" || elt.type === "submit" || elt.tagName === "image" || elt.tagName === "reset" || elt.tagName === "file" ) {
                return false;
            }
            if (elt.type === "checkbox" || elt.type === "radio" ) {
                return elt.checked;
            }
            return true;
        }

        function processInputValue(processed, values, errors, elt, validate) {
            if (elt == null || haveSeenNode(processed, elt)) {
                return;
            } else {
                processed.push(elt);
            }
            if (shouldInclude(elt)) {
                var name = getRawAttribute(elt,"name");
                var value = elt.value;
                if (elt.multiple) {
                    value = toArray(elt.querySelectorAll("option:checked")).map(function (e) { return e.value });
                }
                // include file inputs
                if (elt.files) {
                    value = toArray(elt.files);
                }
                // This is a little ugly because both the current value of the named value in the form
                // and the new value could be arrays, so we have to handle all four cases :/
                if (name != null && value != null) {
                    var current = values[name];
                    if(current) {
                        if (Array.isArray(current)) {
                            if (Array.isArray(value)) {
                                values[name] = current.concat(value);
                            } else {
                                current.push(value);
                            }
                        } else {
                            if (Array.isArray(value)) {
                                values[name] = [current].concat(value);
                            } else {
                                values[name] = [current, value];
                            }
                        }
                    } else {
                        values[name] = value;
                    }
                }
                if (validate) {
                    validateElement(elt, errors);
                }
            }
            if (matches(elt, 'form')) {
                var inputs = elt.elements;
                forEach(inputs, function(input) {
                    processInputValue(processed, values, errors, input, validate);
                });
            }
        }

        function validateElement(element, errors) {
            if (element.willValidate) {
                triggerEvent(element, "htmx:validation:validate")
                if (!element.checkValidity()) {
                    errors.push({elt: element, message:element.validationMessage, validity:element.validity});
                    triggerEvent(element, "htmx:validation:failed", {message:element.validationMessage, validity:element.validity})
                }
            }
        }

        /**
         * @param {HTMLElement} elt
         * @param {string} verb
         */
        function getInputValues(elt, verb) {
            var processed = [];
            var values = {};
            var formValues = {};
            var errors = [];
            var internalData = getInternalData(elt);

            // only validate when form is directly submitted and novalidate or formnovalidate are not set
            var validate = matches(elt, 'form') && elt.noValidate !== true;
            if (internalData.lastButtonClicked) {
                validate = validate && internalData.lastButtonClicked.formNoValidate !== true;
            }

            // for a non-GET include the closest form
            if (verb !== 'get') {
                processInputValue(processed, formValues, errors, closest(elt, 'form'), validate);
            }

            // include the element itself
            processInputValue(processed, values, errors, elt, validate);

            // if a button or submit was clicked last, include its value
            if (internalData.lastButtonClicked) {
                var name = getRawAttribute(internalData.lastButtonClicked,"name");
                if (name) {
                    values[name] = internalData.lastButtonClicked.value;
                }
            }

            // include any explicit includes
            var includes = findAttributeTargets(elt, "hx-include");
            forEach(includes, function(node) {
                processInputValue(processed, values, errors, node, validate);
                // if a non-form is included, include any input values within it
                if (!matches(node, 'form')) {
                    forEach(node.querySelectorAll(INPUT_SELECTOR), function (descendant) {
                        processInputValue(processed, values, errors, descendant, validate);
                    })
                }
            });

            // form values take precedence, overriding the regular values
            values = mergeObjects(values, formValues);

            return {errors:errors, values:values};
        }

        function appendParam(returnStr, name, realValue) {
            if (returnStr !== "") {
                returnStr += "&";
            }
            if (String(realValue) === "[object Object]") {
                realValue = JSON.stringify(realValue);
            }
            var s = encodeURIComponent(realValue);
            returnStr += encodeURIComponent(name) + "=" + s;
            return returnStr;
        }

        function urlEncode(values) {
            var returnStr = "";
            for (var name in values) {
                if (values.hasOwnProperty(name)) {
                    var value = values[name];
                    if (Array.isArray(value)) {
                        forEach(value, function(v) {
                            returnStr = appendParam(returnStr, name, v);
                        });
                    } else {
                        returnStr = appendParam(returnStr, name, value);
                    }
                }
            }
            return returnStr;
        }

        function makeFormData(values) {
            var formData = new FormData();
            for (var name in values) {
                if (values.hasOwnProperty(name)) {
                    var value = values[name];
                    if (Array.isArray(value)) {
                        forEach(value, function(v) {
                            formData.append(name, v);
                        });
                    } else {
                        formData.append(name, value);
                    }
                }
            }
            return formData;
        }

        //====================================================================
        // Ajax
        //====================================================================

        /**
         * @param {HTMLElement} elt
         * @param {HTMLElement} target
         * @param {string} prompt
         * @returns {Object} // TODO: Define/Improve HtmxHeaderSpecification
         */
        function getHeaders(elt, target, prompt) {
            var headers = {
                "HX-Request" : "true",
                "HX-Trigger" : getRawAttribute(elt, "id"),
                "HX-Trigger-Name" : getRawAttribute(elt, "name"),
                "HX-Target" : getAttributeValue(target, "id"),
                "HX-Current-URL" : getDocument().location.href,
            }
            getValuesForElement(elt, "hx-headers", false, headers)
            if (prompt !== undefined) {
                headers["HX-Prompt"] = prompt;
            }
            if (getInternalData(elt).boosted) {
                headers["HX-Boosted"] = "true";
            }
            return headers;
        }

        /**
         * filterValues takes an object containing form input values
         * and returns a new object that only contains keys that are
         * specified by the closest "hx-params" attribute
         * @param {Object} inputValues
         * @param {HTMLElement} elt
         * @returns {Object}
         */
        function filterValues(inputValues, elt) {
            var paramsValue = getClosestAttributeValue(elt, "hx-params");
            if (paramsValue) {
                if (paramsValue === "none") {
                    return {};
                } else if (paramsValue === "*") {
                    return inputValues;
                } else if(paramsValue.indexOf("not ") === 0) {
                    forEach(paramsValue.substr(4).split(","), function (name) {
                        name = name.trim();
                        delete inputValues[name];
                    });
                    return inputValues;
                } else {
                    var newValues = {}
                    forEach(paramsValue.split(","), function (name) {
                        name = name.trim();
                        newValues[name] = inputValues[name];
                    });
                    return newValues;
                }
            } else {
                return inputValues;
            }
        }

        function isAnchorLink(elt) {
          return getRawAttribute(elt, 'href') && getRawAttribute(elt, 'href').indexOf("#") >=0
        }

        /**
         *
         * @param {HTMLElement} elt
         * @param {string} swapInfoOverride
         * @returns {import("./htmx").HtmxSwapSpecification}
         */
        function getSwapSpecification(elt, swapInfoOverride) {
            var swapInfo = swapInfoOverride ? swapInfoOverride : getClosestAttributeValue(elt, "hx-swap");
            var swapSpec = {
                "swapStyle" : getInternalData(elt).boosted ? 'innerHTML' : htmx.config.defaultSwapStyle,
                "swapDelay" : htmx.config.defaultSwapDelay,
                "settleDelay" : htmx.config.defaultSettleDelay
            }
            if (getInternalData(elt).boosted && !isAnchorLink(elt)) {
              swapSpec["show"] = "top"
            }
            if (swapInfo) {
                var split = splitOnWhitespace(swapInfo);
                if (split.length > 0) {
                    swapSpec["swapStyle"] = split[0];
                    for (var i = 1; i < split.length; i++) {
                        var modifier = split[i];
                        if (modifier.indexOf("swap:") === 0) {
                            swapSpec["swapDelay"] = parseInterval(modifier.substr(5));
                        }
                        if (modifier.indexOf("settle:") === 0) {
                            swapSpec["settleDelay"] = parseInterval(modifier.substr(7));
                        }
                        if (modifier.indexOf("scroll:") === 0) {
                            var scrollSpec = modifier.substr(7);
                            var splitSpec = scrollSpec.split(":");
                            var scrollVal = splitSpec.pop();
                            var selectorVal = splitSpec.length > 0 ? splitSpec.join(":") : null;
                            swapSpec["scroll"] = scrollVal;
                            swapSpec["scrollTarget"] = selectorVal;
                        }
                        if (modifier.indexOf("show:") === 0) {
                            var showSpec = modifier.substr(5);
                            var splitSpec = showSpec.split(":");
                            var showVal = splitSpec.pop();
                            var selectorVal = splitSpec.length > 0 ? splitSpec.join(":") : null;
                            swapSpec["show"] = showVal;
                            swapSpec["showTarget"] = selectorVal;
                        }
                        if (modifier.indexOf("focus-scroll:") === 0) {
                            var focusScrollVal = modifier.substr("focus-scroll:".length);
                            swapSpec["focusScroll"] = focusScrollVal == "true";
                        }
                    }
                }
            }
            return swapSpec;
        }

        function usesFormData(elt) {
            return getClosestAttributeValue(elt, "hx-encoding") === "multipart/form-data" ||
                (matches(elt, "form") && getRawAttribute(elt, 'enctype') === "multipart/form-data");
        }

        function encodeParamsForBody(xhr, elt, filteredParameters) {
            var encodedParameters = null;
            withExtensions(elt, function (extension) {
                if (encodedParameters == null) {
                    encodedParameters = extension.encodeParameters(xhr, filteredParameters, elt);
                }
            });
            if (encodedParameters != null) {
                return encodedParameters;
            } else {
                if (usesFormData(elt)) {
                    return makeFormData(filteredParameters);
                } else {
                    return urlEncode(filteredParameters);
                }
            }
        }

        /**
         *
         * @param {Element} target
         * @returns {import("./htmx").HtmxSettleInfo}
         */
        function makeSettleInfo(target) {
            return {tasks: [], elts: [target]};
        }

        function updateScrollState(content, swapSpec) {
            var first = content[0];
            var last = content[content.length - 1];
            if (swapSpec.scroll) {
                var target = null;
                if (swapSpec.scrollTarget) {
                    target = querySelectorExt(first, swapSpec.scrollTarget);
                }
                if (swapSpec.scroll === "top" && (first || target)) {
                    target = target || first;
                    target.scrollTop = 0;
                }
                if (swapSpec.scroll === "bottom" && (last || target)) {
                    target = target || last;
                    target.scrollTop = target.scrollHeight;
                }
            }
            if (swapSpec.show) {
                var target = null;
                if (swapSpec.showTarget) {
                    var targetStr = swapSpec.showTarget;
                    if (swapSpec.showTarget === "window") {
                        targetStr = "body";
                    }
                    target = querySelectorExt(first, targetStr);
                }
                if (swapSpec.show === "top" && (first || target)) {
                    target = target || first;
                    target.scrollIntoView({block:'start', behavior: htmx.config.scrollBehavior});
                }
                if (swapSpec.show === "bottom" && (last || target)) {
                    target = target || last;
                    target.scrollIntoView({block:'end', behavior: htmx.config.scrollBehavior});
                }
            }
        }

        /**
         * @param {HTMLElement} elt
         * @param {string} attr
         * @param {boolean=} evalAsDefault
         * @param {Object=} values
         * @returns {Object}
         */
        function getValuesForElement(elt, attr, evalAsDefault, values) {
            if (values == null) {
                values = {};
            }
            if (elt == null) {
                return values;
            }
            var attributeValue = getAttributeValue(elt, attr);
            if (attributeValue) {
                var str = attributeValue.trim();
                var evaluateValue = evalAsDefault;
                if (str.indexOf("javascript:") === 0) {
                    str = str.substr(11);
                    evaluateValue = true;
                } else if (str.indexOf("js:") === 0) {
                    str = str.substr(3);
                    evaluateValue = true;
                }
                if (str.indexOf('{') !== 0) {
                    str = "{" + str + "}";
                }
                var varsValues;
                if (evaluateValue) {
                    varsValues = maybeEval(elt,function () {return Function("return (" + str + ")")();}, {});
                } else {
                    varsValues = parseJSON(str);
                }
                for (var key in varsValues) {
                    if (varsValues.hasOwnProperty(key)) {
                        if (values[key] == null) {
                            values[key] = varsValues[key];
                        }
                    }
                }
            }
            return getValuesForElement(parentElt(elt), attr, evalAsDefault, values);
        }

        function maybeEval(elt, toEval, defaultVal) {
            if (htmx.config.allowEval) {
                return toEval();
            } else {
                triggerErrorEvent(elt, 'htmx:evalDisallowedError');
                return defaultVal;
            }
        }

        /**
         * @param {HTMLElement} elt
         * @param {*} expressionVars
         * @returns
         */
        function getHXVarsForElement(elt, expressionVars) {
            return getValuesForElement(elt, "hx-vars", true, expressionVars);
        }

        /**
         * @param {HTMLElement} elt
         * @param {*} expressionVars
         * @returns
         */
        function getHXValsForElement(elt, expressionVars) {
            return getValuesForElement(elt, "hx-vals", false, expressionVars);
        }

        /**
         * @param {HTMLElement} elt
         * @returns {Object}
         */
        function getExpressionVars(elt) {
            return mergeObjects(getHXVarsForElement(elt), getHXValsForElement(elt));
        }

        function safelySetHeaderValue(xhr, header, headerValue) {
            if (headerValue !== null) {
                try {
                    xhr.setRequestHeader(header, headerValue);
                } catch (e) {
                    // On an exception, try to set the header URI encoded instead
                    xhr.setRequestHeader(header, encodeURIComponent(headerValue));
                    xhr.setRequestHeader(header + "-URI-AutoEncoded", "true");
                }
            }
        }

        function getPathFromResponse(xhr) {
            // NB: IE11 does not support this stuff
            if (xhr.responseURL && typeof(URL) !== "undefined") {
                try {
                    var url = new URL(xhr.responseURL);
                    return url.pathname + url.search;
                } catch (e) {
                    triggerErrorEvent(getDocument().body, "htmx:badResponseUrl", {url: xhr.responseURL});
                }
            }
        }

        function hasHeader(xhr, regexp) {
            return xhr.getAllResponseHeaders().match(regexp);
        }

        function ajaxHelper(verb, path, context) {
            verb = verb.toLowerCase();
            if (context) {
                if (context instanceof Element || isType(context, 'String')) {
                    return issueAjaxRequest(verb, path, null, null, {
                        targetOverride: resolveTarget(context),
                        returnPromise: true
                    });
                } else {
                    return issueAjaxRequest(verb, path, resolveTarget(context.source), context.event,
                        {
                            handler : context.handler,
                            headers : context.headers,
                            values : context.values,
                            targetOverride: resolveTarget(context.target),
                            swapOverride: context.swap,
                            returnPromise: true
                        });
                }
            } else {
                return issueAjaxRequest(verb, path, null, null, {
                        returnPromise: true
                });
            }
        }

        function hierarchyForElt(elt) {
            var arr = [];
            while (elt) {
                arr.push(elt);
                elt = elt.parentElement;
            }
            return arr;
        }

        function issueAjaxRequest(verb, path, elt, event, etc) {
            var resolve = null;
            var reject = null;
            etc = etc != null ? etc : {};
            if(etc.returnPromise && typeof Promise !== "undefined"){
                var promise = new Promise(function (_resolve, _reject) {
                    resolve = _resolve;
                    reject = _reject;
                });
            }
            if(elt == null) {
                elt = getDocument().body;
            }
            var responseHandler = etc.handler || handleAjaxResponse;

            if (!bodyContains(elt)) {
                return; // do not issue requests for elements removed from the DOM
            }
            var target = etc.targetOverride || getTarget(elt);
            if (target == null || target == DUMMY_ELT) {
                triggerErrorEvent(elt, 'htmx:targetError', {target: getAttributeValue(elt, "hx-target")});
                return;
            }

            var syncElt = elt;
            var eltData = getInternalData(elt);
            var syncStrategy = getClosestAttributeValue(elt, "hx-sync");
            var queueStrategy = null;
            var abortable = false;
            if (syncStrategy) {
                var syncStrings = syncStrategy.split(":");
                var selector = syncStrings[0].trim();
                if (selector === "this") {
                    syncElt = findThisElement(elt, 'hx-sync');
                } else {
                    syncElt = querySelectorExt(elt, selector);
                }
                // default to the drop strategy
                syncStrategy = (syncStrings[1] || 'drop').trim();
                eltData = getInternalData(syncElt);
                if (syncStrategy === "drop" && eltData.xhr && eltData.abortable !== true) {
                    return;
                } else if (syncStrategy === "abort") {
                    if (eltData.xhr) {
                        return;
                    } else {
                        abortable = true;
                    }
                } else if (syncStrategy === "replace") {
                    triggerEvent(syncElt, 'htmx:abort'); // abort the current request and continue
                } else if (syncStrategy.indexOf("queue") === 0) {
                    var queueStrArray = syncStrategy.split(" ");
                    queueStrategy = (queueStrArray[1] || "last").trim();
                }
            }

            if (eltData.xhr) {
                if (eltData.abortable) {
                    triggerEvent(syncElt, 'htmx:abort'); // abort the current request and continue
                } else {
                    if(queueStrategy == null){
                        if (event) {
                            var eventData = getInternalData(event);
                            if (eventData && eventData.triggerSpec && eventData.triggerSpec.queue) {
                                queueStrategy = eventData.triggerSpec.queue;
                            }
                        }
                        if (queueStrategy == null) {
                            queueStrategy = "last";
                        }
                    }
                    if (eltData.queuedRequests == null) {
                        eltData.queuedRequests = [];
                    }
                    if (queueStrategy === "first" && eltData.queuedRequests.length === 0) {
                        eltData.queuedRequests.push(function () {
                            issueAjaxRequest(verb, path, elt, event, etc)
                        });
                    } else if (queueStrategy === "all") {
                        eltData.queuedRequests.push(function () {
                            issueAjaxRequest(verb, path, elt, event, etc)
                        });
                    } else if (queueStrategy === "last") {
                        eltData.queuedRequests = []; // dump existing queue
                        eltData.queuedRequests.push(function () {
                            issueAjaxRequest(verb, path, elt, event, etc)
                        });
                    }
                    return;
                }
            }

            var xhr = new XMLHttpRequest();
            eltData.xhr = xhr;
            eltData.abortable = abortable;
            var endRequestLock = function(){
                eltData.xhr = null;
                eltData.abortable = false;
                if (eltData.queuedRequests != null &&
                    eltData.queuedRequests.length > 0) {
                    var queuedRequest = eltData.queuedRequests.shift();
                    queuedRequest();
                }
            }
            var promptQuestion = getClosestAttributeValue(elt, "hx-prompt");
            if (promptQuestion) {
                var promptResponse = prompt(promptQuestion);
                // prompt returns null if cancelled and empty string if accepted with no entry
                if (promptResponse === null ||
                    !triggerEvent(elt, 'htmx:prompt', {prompt: promptResponse, target:target})) {
                    maybeCall(resolve);
                    endRequestLock();
                    return promise;
                }
            }

            var confirmQuestion = getClosestAttributeValue(elt, "hx-confirm");
            if (confirmQuestion) {
                if(!confirm(confirmQuestion)) {
                    maybeCall(resolve);
                    endRequestLock()
                    return promise;
                }
            }


            var headers = getHeaders(elt, target, promptResponse);
            if (etc.headers) {
                headers = mergeObjects(headers, etc.headers);
            }
            var results = getInputValues(elt, verb);
            var errors = results.errors;
            var rawParameters = results.values;
            if (etc.values) {
                rawParameters = mergeObjects(rawParameters, etc.values);
            }
            var expressionVars = getExpressionVars(elt);
            var allParameters = mergeObjects(rawParameters, expressionVars);
            var filteredParameters = filterValues(allParameters, elt);

            if (verb !== 'get' && !usesFormData(elt)) {
                headers['Content-Type'] = 'application/x-www-form-urlencoded';
            }

            // behavior of anchors w/ empty href is to use the current URL
            if (path == null || path === "") {
                path = getDocument().location.href;
            }


            var requestAttrValues = getValuesForElement(elt, 'hx-request');

            var requestConfig = {
                parameters: filteredParameters,
                unfilteredParameters: allParameters,
                headers:headers,
                target:target,
                verb:verb,
                errors:errors,
                withCredentials: etc.credentials || requestAttrValues.credentials || htmx.config.withCredentials,
                timeout:  etc.timeout || requestAttrValues.timeout || htmx.config.timeout,
                path:path,
                triggeringEvent:event
            };

            if(!triggerEvent(elt, 'htmx:configRequest', requestConfig)){
                maybeCall(resolve);
                endRequestLock();
                return promise;
            }

            // copy out in case the object was overwritten
            path = requestConfig.path;
            verb = requestConfig.verb;
            headers = requestConfig.headers;
            filteredParameters = requestConfig.parameters;
            errors = requestConfig.errors;

            if(errors && errors.length > 0){
                triggerEvent(elt, 'htmx:validation:halted', requestConfig)
                maybeCall(resolve);
                endRequestLock();
                return promise;
            }

            var splitPath = path.split("#");
            var pathNoAnchor = splitPath[0];
            var anchor = splitPath[1];
            var finalPathForGet = null;
            if (verb === 'get') {
                finalPathForGet = pathNoAnchor;
                var values = Object.keys(filteredParameters).length !== 0;
                if (values) {
                    if (finalPathForGet.indexOf("?") < 0) {
                        finalPathForGet += "?";
                    } else {
                        finalPathForGet += "&";
                    }
                    finalPathForGet += urlEncode(filteredParameters);
                    if (anchor) {
                        finalPathForGet += "#" + anchor;
                    }
                }
                xhr.open('GET', finalPathForGet, true);
            } else {
                xhr.open(verb.toUpperCase(), path, true);
            }

            xhr.overrideMimeType("text/html");
            xhr.withCredentials = requestConfig.withCredentials;
            xhr.timeout = requestConfig.timeout;

            // request headers
            if (requestAttrValues.noHeaders) {
                // ignore all headers
            } else {
                for (var header in headers) {
                    if (headers.hasOwnProperty(header)) {
                        var headerValue = headers[header];
                        safelySetHeaderValue(xhr, header, headerValue);
                    }
                }
            }

            var responseInfo = {
                xhr: xhr, target: target, requestConfig: requestConfig, etc: etc,
                pathInfo: {
                    requestPath: path,
                    finalRequestPath: finalPathForGet || path,
                    anchor: anchor
                }
            };

            xhr.onload = function () {
                try {
                    var hierarchy = hierarchyForElt(elt);
                    responseInfo.pathInfo.responsePath = getPathFromResponse(xhr);
                    responseHandler(elt, responseInfo);
                    removeRequestIndicatorClasses(indicators);
                    triggerEvent(elt, 'htmx:afterRequest', responseInfo);
                    triggerEvent(elt, 'htmx:afterOnLoad', responseInfo);
                    // if the body no longer contains the element, trigger the even on the closest parent
                    // remaining in the DOM
                    if (!bodyContains(elt)) {
                        var secondaryTriggerElt = null;
                        while (hierarchy.length > 0 && secondaryTriggerElt == null) {
                            var parentEltInHierarchy = hierarchy.shift();
                            if (bodyContains(parentEltInHierarchy)) {
                                secondaryTriggerElt = parentEltInHierarchy;
                            }
                        }
                        if (secondaryTriggerElt) {
                            triggerEvent(secondaryTriggerElt, 'htmx:afterRequest', responseInfo);
                            triggerEvent(secondaryTriggerElt, 'htmx:afterOnLoad', responseInfo);
                        }
                    }
                    maybeCall(resolve);
                    endRequestLock();
                } catch (e) {
                    triggerErrorEvent(elt, 'htmx:onLoadError', mergeObjects({error:e}, responseInfo));
                    throw e;
                }
            }
            xhr.onerror = function () {
                removeRequestIndicatorClasses(indicators);
                triggerErrorEvent(elt, 'htmx:afterRequest', responseInfo);
                triggerErrorEvent(elt, 'htmx:sendError', responseInfo);
                maybeCall(reject);
                endRequestLock();
            }
            xhr.onabort = function() {
                removeRequestIndicatorClasses(indicators);
                triggerErrorEvent(elt, 'htmx:afterRequest', responseInfo);
                triggerErrorEvent(elt, 'htmx:sendAbort', responseInfo);
                maybeCall(reject);
                endRequestLock();
            }
            xhr.ontimeout = function() {
                removeRequestIndicatorClasses(indicators);
                triggerErrorEvent(elt, 'htmx:afterRequest', responseInfo);
                triggerErrorEvent(elt, 'htmx:timeout', responseInfo);
                maybeCall(reject);
                endRequestLock();
            }
            if(!triggerEvent(elt, 'htmx:beforeRequest', responseInfo)){
                maybeCall(resolve);
                endRequestLock()
                return promise
            }
            var indicators = addRequestIndicatorClasses(elt);

            forEach(['loadstart', 'loadend', 'progress', 'abort'], function(eventName) {
                forEach([xhr, xhr.upload], function (target) {
                    target.addEventListener(eventName, function(event){
                        triggerEvent(elt, "htmx:xhr:" + eventName, {
                            lengthComputable:event.lengthComputable,
                            loaded:event.loaded,
                            total:event.total
                        });
                    })
                });
            });
            triggerEvent(elt, 'htmx:beforeSend', responseInfo);
            xhr.send(verb === 'get' ? null : encodeParamsForBody(xhr, elt, filteredParameters));
            return promise;
        }

        function determineHistoryUpdates(elt, responseInfo) {

            var xhr = responseInfo.xhr;

            //===========================================
            // First consult response headers
            //===========================================
            var pathFromHeaders = null;
            var typeFromHeaders = null;
            if (hasHeader(xhr,/HX-Push:/i)) {
                pathFromHeaders = xhr.getResponseHeader("HX-Push");
                typeFromHeaders = "push";
            } else if (hasHeader(xhr,/HX-Push-Url:/i)) {
                pathFromHeaders = xhr.getResponseHeader("HX-Push-Url");
                typeFromHeaders = "push";
            } else if (hasHeader(xhr,/HX-Replace-Url:/i)) {
                pathFromHeaders = xhr.getResponseHeader("HX-Replace-Url");
                typeFromHeaders = "replace";
            }

            // if there was a response header, that has priority
            if (pathFromHeaders) {
                if (pathFromHeaders === "false") {
                    return {}
                } else {
                    return {
                        type: typeFromHeaders,
                        path : pathFromHeaders
                    }
                }
            }

            //===========================================
            // Next resolve via DOM values
            //===========================================
            var requestPath =  responseInfo.pathInfo.finalRequestPath;
            var responsePath =  responseInfo.pathInfo.responsePath;

            var pushUrl = getClosestAttributeValue(elt, "hx-push-url");
            var replaceUrl = getClosestAttributeValue(elt, "hx-replace-url");
            var elementIsBoosted = getInternalData(elt).boosted;

            var saveType = null;
            var path = null;

            if (pushUrl) {
                saveType = "push";
                path = pushUrl;
            } else if (replaceUrl) {
                saveType = "replace";
                path = replaceUrl;
            } else if (elementIsBoosted) {
                saveType = "push";
                path = responsePath || requestPath; // if there is no response path, go with the original request path
            }

            if (path) {
                // false indicates no push, return empty object
                if (path === "false") {
                    return {};
                }

                // true indicates we want to follow wherever the server ended up sending us
                if (path === "true") {
                    path = responsePath || requestPath; // if there is no response path, go with the original request path
                }

                // restore any anchor associated with the request
                if (responseInfo.pathInfo.anchor &&
                    path.indexOf("#") === -1) {
                    path = path + "#" + responseInfo.pathInfo.anchor;
                }

                return {
                    type:saveType,
                    path: path
                }
            } else {
                return {};
            }
        }

        function handleAjaxResponse(elt, responseInfo) {
            var xhr = responseInfo.xhr;
            var target = responseInfo.target;
            var etc = responseInfo.etc;

            if (!triggerEvent(elt, 'htmx:beforeOnLoad', responseInfo)) return;

            if (hasHeader(xhr, /HX-Trigger:/i)) {
                handleTrigger(xhr, "HX-Trigger", elt);
            }

            if (hasHeader(xhr, /HX-Location:/i)) {
                saveCurrentPageToHistory();
                var redirectPath = xhr.getResponseHeader("HX-Location");
                var swapSpec;
                if (redirectPath.indexOf("{") === 0) {
                    swapSpec = parseJSON(redirectPath);
                    // what's the best way to throw an error if the user didn't include this
                    redirectPath = swapSpec['path'];
                    delete swapSpec['path'];
                }
                ajaxHelper('GET', redirectPath, swapSpec).then(() =>{
                    pushUrlIntoHistory(redirectPath);
                });
                return;
            }

            if (hasHeader(xhr, /HX-Redirect:/i)) {
                location.href = xhr.getResponseHeader("HX-Redirect");
                return;
            }

            if (hasHeader(xhr,/HX-Refresh:/i)) {
                if ("true" === xhr.getResponseHeader("HX-Refresh")) {
                    location.reload();
                    return;
                }
            }

            if (hasHeader(xhr,/HX-Retarget:/i)) {
                responseInfo.target = getDocument().querySelector(xhr.getResponseHeader("HX-Retarget"));
            }

            var historyUpdate = determineHistoryUpdates(elt, responseInfo);

            // by default htmx only swaps on 200 return codes and does not swap
            // on 204 'No Content'
            // this can be ovverriden by responding to the htmx:beforeSwap event and
            // overriding the detail.shouldSwap property
            var shouldSwap = xhr.status >= 200 && xhr.status < 400 && xhr.status !== 204;
            var serverResponse = xhr.response;
            var isError = xhr.status >= 400;
            var beforeSwapDetails = mergeObjects({shouldSwap: shouldSwap, serverResponse:serverResponse, isError:isError}, responseInfo);
            if (!triggerEvent(target, 'htmx:beforeSwap', beforeSwapDetails)) return;

            target = beforeSwapDetails.target; // allow re-targeting
            serverResponse = beforeSwapDetails.serverResponse; // allow updating content
            isError = beforeSwapDetails.isError; // allow updating error

            responseInfo.failed = isError; // Make failed property available to response events
            responseInfo.successful = !isError; // Make successful property available to response events

            if (beforeSwapDetails.shouldSwap) {
                if (xhr.status === 286) {
                    cancelPolling(elt);
                }

                withExtensions(elt, function (extension) {
                    serverResponse = extension.transformResponse(serverResponse, xhr, elt);
                });

                // Save current page if there will be a history update
                if (historyUpdate.type) {
                    saveCurrentPageToHistory();
                }

                var swapOverride = etc.swapOverride;
                if (hasHeader(xhr,/HX-Reswap:/i)) {
                    swapOverride = xhr.getResponseHeader("HX-Reswap");
                }
                var swapSpec = getSwapSpecification(elt, swapOverride);

                target.classList.add(htmx.config.swappingClass);
                var doSwap = function () {
                    try {

                        var activeElt = document.activeElement;
                        var selectionInfo = {};
                        try {
                            selectionInfo = {
                                elt: activeElt,
                                // @ts-ignore
                                start: activeElt ? activeElt.selectionStart : null,
                                // @ts-ignore
                                end: activeElt ? activeElt.selectionEnd : null
                            };
                        } catch (e) {
                            // safari issue - see https://github.com/microsoft/playwright/issues/5894
                        }

                        var settleInfo = makeSettleInfo(target);
                        selectAndSwap(swapSpec.swapStyle, target, elt, serverResponse, settleInfo);

                        if (selectionInfo.elt &&
                            !bodyContains(selectionInfo.elt) &&
                            selectionInfo.elt.id) {
                            var newActiveElt = document.getElementById(selectionInfo.elt.id);
                            var focusOptions = { preventScroll: swapSpec.focusScroll !== undefined ? !swapSpec.focusScroll : !htmx.config.defaultFocusScroll };
                            if (newActiveElt) {
                                // @ts-ignore
                                if (selectionInfo.start && newActiveElt.setSelectionRange) {
                                    // @ts-ignore
                                    newActiveElt.setSelectionRange(selectionInfo.start, selectionInfo.end);
                                }
                                newActiveElt.focus(focusOptions);
                            }
                        }

                        target.classList.remove(htmx.config.swappingClass);
                        forEach(settleInfo.elts, function (elt) {
                            if (elt.classList) {
                                elt.classList.add(htmx.config.settlingClass);
                            }
                            triggerEvent(elt, 'htmx:afterSwap', responseInfo);
                        });

                        if (hasHeader(xhr, /HX-Trigger-After-Swap:/i)) {
                            var finalElt = elt;
                            if (!bodyContains(elt)) {
                                finalElt = getDocument().body;
                            }
                            handleTrigger(xhr, "HX-Trigger-After-Swap", finalElt);
                        }

                        var doSettle = function () {
                            forEach(settleInfo.tasks, function (task) {
                                task.call();
                            });
                            forEach(settleInfo.elts, function (elt) {
                                if (elt.classList) {
                                    elt.classList.remove(htmx.config.settlingClass);
                                }
                                triggerEvent(elt, 'htmx:afterSettle', responseInfo);
                            });

                            // if we need to save history, do so
                            if (historyUpdate.type) {
                                if (historyUpdate.type === "push") {
                                    pushUrlIntoHistory(historyUpdate.path);
                                    triggerEvent(getDocument().body, 'htmx:pushedIntoHistory', {path: historyUpdate.path});
                                } else {
                                    replaceUrlInHistory(historyUpdate.path);
                                    triggerEvent(getDocument().body, 'htmx:replacedInHistory', {path: historyUpdate.path});
                                }
                            }
                            if (responseInfo.pathInfo.anchor) {
                                var anchorTarget = find("#" + responseInfo.pathInfo.anchor);
                                if(anchorTarget) {
                                    anchorTarget.scrollIntoView({block:'start', behavior: "auto"});
                                }
                            }

                            if(settleInfo.title) {
                                var titleElt = find("title");
                                if(titleElt) {
                                    titleElt.innerHTML = settleInfo.title;
                                } else {
                                    window.document.title = settleInfo.title;
                                }
                            }

                            updateScrollState(settleInfo.elts, swapSpec);

                            if (hasHeader(xhr, /HX-Trigger-After-Settle:/i)) {
                                var finalElt = elt;
                                if (!bodyContains(elt)) {
                                    finalElt = getDocument().body;
                                }
                                handleTrigger(xhr, "HX-Trigger-After-Settle", finalElt);
                            }
                        }

                        if (swapSpec.settleDelay > 0) {
                            setTimeout(doSettle, swapSpec.settleDelay)
                        } else {
                            doSettle();
                        }
                    } catch (e) {
                        triggerErrorEvent(elt, 'htmx:swapError', responseInfo);
                        throw e;
                    }
                };

                if (swapSpec.swapDelay > 0) {
                    setTimeout(doSwap, swapSpec.swapDelay)
                } else {
                    doSwap();
                }
            }
            if (isError) {
                triggerErrorEvent(elt, 'htmx:responseError', mergeObjects({error: "Response Status Error Code " + xhr.status + " from " + responseInfo.pathInfo.path}, responseInfo));
            }
        }

        //====================================================================
        // Extensions API
        //====================================================================

        /** @type {Object<string, import("./htmx").HtmxExtension>} */
        var extensions = {};

        /**
         * extensionBase defines the default functions for all extensions.
         * @returns {import("./htmx").HtmxExtension}
         */
        function extensionBase() {
            return {
                init: function(api) {return null;},
                onEvent : function(name, evt) {return true;},
                transformResponse : function(text, xhr, elt) {return text;},
                isInlineSwap : function(swapStyle) {return false;},
                handleSwap : function(swapStyle, target, fragment, settleInfo) {return false;},
                encodeParameters : function(xhr, parameters, elt) {return null;}
            }
        }

        /**
         * defineExtension initializes the extension and adds it to the htmx registry
         *
         * @param {string} name
         * @param {import("./htmx").HtmxExtension} extension
         */
        function defineExtension(name, extension) {
            if(extension.init) {
                extension.init(internalAPI)
            }
            extensions[name] = mergeObjects(extensionBase(), extension);
        }

        /**
         * removeExtension removes an extension from the htmx registry
         *
         * @param {string} name
         */
        function removeExtension(name) {
            delete extensions[name];
        }

        /**
         * getExtensions searches up the DOM tree to return all extensions that can be applied to a given element
         *
         * @param {HTMLElement} elt
         * @param {import("./htmx").HtmxExtension[]=} extensionsToReturn
         * @param {import("./htmx").HtmxExtension[]=} extensionsToIgnore
         */
         function getExtensions(elt, extensionsToReturn, extensionsToIgnore) {

            if (elt == undefined) {
                return extensionsToReturn;
            }
            if (extensionsToReturn == undefined) {
                extensionsToReturn = [];
            }
            if (extensionsToIgnore == undefined) {
                extensionsToIgnore = [];
            }
            var extensionsForElement = getAttributeValue(elt, "hx-ext");
            if (extensionsForElement) {
                forEach(extensionsForElement.split(","), function(extensionName){
                    extensionName = extensionName.replace(/ /g, '');
                    if (extensionName.slice(0, 7) == "ignore:") {
                        extensionsToIgnore.push(extensionName.slice(7));
                        return;
                    }
                    if (extensionsToIgnore.indexOf(extensionName) < 0) {
                        var extension = extensions[extensionName];
                        if (extension && extensionsToReturn.indexOf(extension) < 0) {
                            extensionsToReturn.push(extension);
                        }
                    }
                });
            }
            return getExtensions(parentElt(elt), extensionsToReturn, extensionsToIgnore);
        }

        //====================================================================
        // Initialization
        //====================================================================

        function ready(fn) {
            if (getDocument().readyState !== 'loading') {
                fn();
            } else {
                getDocument().addEventListener('DOMContentLoaded', fn);
            }
        }

        function insertIndicatorStyles() {
            if (htmx.config.includeIndicatorStyles !== false) {
                getDocument().head.insertAdjacentHTML("beforeend",
                    "<style>\
                      ." + htmx.config.indicatorClass + "{opacity:0;transition: opacity 200ms ease-in;}\
                      ." + htmx.config.requestClass + " ." + htmx.config.indicatorClass + "{opacity:1}\
                      ." + htmx.config.requestClass + "." + htmx.config.indicatorClass + "{opacity:1}\
                    </style>");
            }
        }

        function getMetaConfig() {
            var element = getDocument().querySelector('meta[name="htmx-config"]');
            if (element) {
                // @ts-ignore
                return parseJSON(element.content);
            } else {
                return null;
            }
        }

        function mergeMetaConfig() {
            var metaConfig = getMetaConfig();
            if (metaConfig) {
                htmx.config = mergeObjects(htmx.config , metaConfig)
            }
        }

        // initialize the document
        ready(function () {
            mergeMetaConfig();
            insertIndicatorStyles();
            var body = getDocument().body;
            processNode(body);
            var restoredElts = getDocument().querySelectorAll(
                "[hx-trigger='restored'],[data-hx-trigger='restored']"
            );
            body.addEventListener("htmx:abort", function (evt) {
                var target = evt.target;
                var internalData = getInternalData(target);
                if (internalData && internalData.xhr) {
                    internalData.xhr.abort();
                }
            });
            window.onpopstate = function (event) {
                if (event.state && event.state.htmx) {
                    restoreHistory();
                    forEach(restoredElts, function(elt){
                        triggerEvent(elt, 'htmx:restored', {
                            'document': getDocument(),
                            'triggerEvent': triggerEvent
                        });
                    });
                }
            };
            setTimeout(function () {
                triggerEvent(body, 'htmx:load', {}); // give ready handlers a chance to load up before firing this event
            }, 0);
        })

        return htmx;
    }
)()
}));