6 месяцев назад · 6ce526de32
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
 
				+# Default ignored files
			
 
				+/shelf/
			
 
				+/workspace.xml
			
 
				+# Editor-based HTTP Client requests
			
 
				+/httpRequests/
			
 
				+# Datasource local storage ignored files
			
 
				+/dataSources/
			
 
				+/dataSources.local.xml
			
--- a/.idea/codeStyles/codeStyleConfig.xml
+++ b/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
 
				+<component name="ProjectCodeStyleConfiguration">
			
 
				+  <state>
			
 
				+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
			
 
				+  </state>
			
 
				+</component>
			
--- a/.idea/demo-htmx.iml
+++ b/.idea/demo-htmx.iml
@@ -0,0 +1,10 @@
 
				+<?xml version="1.0" encoding="UTF-8"?>
			
 
				+<module type="WEB_MODULE" version="4">
			
 
				+  <component name="Go" enabled="true" />
			
 
				+  <component name="NewModuleRootManager">
			
 
				+    <content url="file://$MODULE_DIR$" />
			
 
				+    <orderEntry type="inheritedJdk" />
			
 
				+    <orderEntry type="sourceFolder" forTests="false" />
			
 
				+    <orderEntry type="library" name="htmx.org" level="application" />
			
 
				+  </component>
			
 
				+</module>
			
--- a/.idea/jsLibraryMappings.xml
+++ b/.idea/jsLibraryMappings.xml
@@ -0,0 +1,6 @@
 
				+<?xml version="1.0" encoding="UTF-8"?>
			
 
				+<project version="4">
			
 
				+  <component name="JavaScriptLibraryMappings">
			
 
				+    <file url="PROJECT" libraries="{htmx.org}" />
			
 
				+  </component>
			
 
				+</project>
			
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
 
				+<?xml version="1.0" encoding="UTF-8"?>
			
 
				+<project version="4">
			
 
				+  <component name="ProjectModuleManager">
			
 
				+    <modules>
			
 
				+      <module fileurl="file://$PROJECT_DIR$/.idea/demo-htmx.iml" filepath="$PROJECT_DIR$/.idea/demo-htmx.iml" />
			
 
				+    </modules>
			
 
				+  </component>
			
 
				+</project>
			
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
 
				+<?xml version="1.0" encoding="UTF-8"?>
			
 
				+<project version="4">
			
 
				+  <component name="VcsDirectoryMappings">
			
 
				+    <mapping directory="" vcs="Git" />
			
 
				+  </component>
			
 
				+</project>
			
--- a/doc/htmx-ch04.md
+++ b/doc/htmx-ch04.md
@@ -0,0 +1,44 @@
 
				+# HTMX
			
 
				+## Attributes
			
 
				+
			
 
				+- `hx-[delete|get|patch|post|put]` - AJAX method to use
			
 
				+- `hx-swap`
			
 
				+  - `innerHTML` - Default, replace hx-target inner html.
			
 
				+  - `outerHTML` - Replace the hx-target itself
			
 
				+  - `beforebegin` - Insert before hx-target
			
 
				+  - `afterbegin` - Insert before hx-target first child
			
 
				+  - `beforeend` - Insert after hx-target last child
			
 
				+  - `afterend` - Insert response after hx-target
			
 
				+  - `delete` - Deletes hx-target regardless of the response.
			
 
				+  - `none` - No swap.
			
 
				+- `hx-target`: CSS selector for `hx-swap` action
			
 
				+- `hx-trigger`: comma-separated list of events triggering a request, often the default:
			
 
				+  - On `input`, `textarea`, `select`: `change`
			
 
				+  - On `form`: `submit`
			
 
				+  - On all other elements: `click`
			
 
				+  - Filters: 
			
 
				+    - in `[]` after the event name 
			
 
				+    - Example: `keyup[ctrlKey && key == 'l']` to catch CTRL-L
			
 
				+  - Specify event source with `from:<extended CSS selector>`, 
			
 
				+    - defaults to current element
			
 
				+    - Example: `from:body` to receive events from the whole body
			
 
				+  - Complete spec: https://htmx.org/attributes/hx-trigger/
			
 
				+- `hx-include`: 
			
 
				+  - when `hx-post`-ing outside a form, specify which elements to include, as if they had been in a form along with the posting button
			
 
				+  - supports matching on multiple comma-separated selectors 
			
 
				+- `hx-vals`: value as a JSON string or JS dynamic value
			
 
				+  - example: `hx-vals='{"state":"MT"}'`
			
 
				+  - example: `hx-vals='js:{"state":getCurrentState()}'`
			
 
				+
			
 
				+
			
 
				+## Extended CSS selectors
			
 
				+
			
 
				+- support multiple comma-separated selectors, but...
			
 
				+  - `hx-target`: return first matching element from first selector (?)
			
 
				+  - `hx-trigger from:` and `hx-include`: return first matching child
			
 
				+- relative selectors:
			
 
				+  - `closest:` closest parent matching selector
			
 
				+  - `(previous|next):`: previous or next element (not necessarily sibling) matching selector
			
 
				+  - `find:` next child matching selector
			
 
				+  - `this:` the current element
			
 
				+  - 
			
--- a/go.mod
+++ b/go.mod
@@ -0,0 +1,3 @@
 
				+module code.osinet.fr/fgm/demo-htmx
			
 
				+
			
 
				+go 1.22.2
			
--- a/main.go
+++ b/main.go
@@ -0,0 +1,20 @@
 
				+package main
			
 
				+
			
 
				+import (
			
 
				+	"log"
			
 
				+	"os"
			
 
				+
			
 
				+	"code.osinet.fr/fgm/demo-htmx/web"
			
 
				+)
			
 
				+
			
 
				+func realMain() int {
			
 
				+	if err := web.UI(":8080"); err != nil {
			
 
				+		log.Println(err)
			
 
				+		return 1
			
 
				+	}
			
 
				+	return 0
			
 
				+}
			
 
				+
			
 
				+func main() {
			
 
				+	os.Exit(realMain())
			
 
				+}
			
--- a/web/public/00.html
+++ b/web/public/00.html
@@ -0,0 +1,19 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css" />
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Default: swap current element</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<button hx-post="/contacts" hx-swap="innerHTML">
			
 
				+    Contacts
			
 
				+</button>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/01.html
+++ b/web/public/01.html
@@ -0,0 +1,22 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css" />
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>hx-target : target another element</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <div class="list"></div>
			
 
				+    <button hx-post="/contacts" hx-target="#main .list" hx-swap="innerHTML">
			
 
				+        Contacts
			
 
				+    </button>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/02.html
+++ b/web/public/02.html
@@ -0,0 +1,22 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css" />
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>hx-trigger: trigger on mouseenter</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <div class="list"></div>
			
 
				+    <button hx-post="/contacts" hx-target="#main .list" hx-swap="innerHTML" hx-trigger="mouseenter">
			
 
				+        Contacts
			
 
				+    </button>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/03.html
+++ b/web/public/03.html
@@ -0,0 +1,26 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css"/>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>hx-trigger: <code>^L</code> keyboard shortcut</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <div class="list"></div>
			
 
				+    <button
			
 
				+            hx-post="/contacts"
			
 
				+            hx-target="#main .list"
			
 
				+            hx-swap="innerHTML"
			
 
				+            hx-trigger="click,keyup[ctrlKey && key == 'l'] from:body">
			
 
				+        Contacts
			
 
				+    </button>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/04.html
+++ b/web/public/04.html
@@ -0,0 +1,26 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css"/>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Forms</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <form>
			
 
				+        <label for="search">Search Contacts:</label>
			
 
				+        <input id="search" name="q" type="search" placeholder="Search Contacts">
			
 
				+        <button hx-post="/search" hx-target="#main .results">
			
 
				+            Search The Contacts
			
 
				+        </button>
			
 
				+    </form>
			
 
				+    <div class="results"></div>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/05.html
+++ b/web/public/05.html
@@ -0,0 +1,26 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css"/>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Including inputs without forms</h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <label for="search">Search Contacts:</label>
			
 
				+    <input id="search" name="q" type="search" placeholder="Search Contacts">
			
 
				+    <button hx-get="/search"
			
 
				+            hx-target="#main .results"
			
 
				+            hx-include="#search">
			
 
				+        Search The Contacts
			
 
				+    </button>
			
 
				+    <div class="results"></div>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/06.html
+++ b/web/public/06.html
@@ -0,0 +1,27 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <title id="page-title">HTMX Demos</title>
			
 
				+    <script src="htmx-1-9-12.min.js"></script>
			
 
				+    <link rel="stylesheet" href="styles.css"/>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Including static values with <code>hx-vals</code></h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+    <label for="search">Search Contacts:</label>
			
 
				+    <input id="search" name="q" type="search" placeholder="Search Contacts">
			
 
				+    <button hx-get="/search"
			
 
				+            hx-target="#main .results"
			
 
				+            hx-include="#search"
			
 
				+            hx-vals='{"state":"Montana"}'>
			
 
				+        Search The Contacts
			
 
				+    </button>
			
 
				+    <div class="results"></div>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/07.html
+++ b/web/public/07.html
@@ -0,0 +1,32 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+  <meta charset="UTF-8">
			
 
				+  <title id="page-title">HTMX Demos</title>
			
 
				+  <script src="htmx-1-9-12.min.js"></script>
			
 
				+  <link rel="stylesheet" href="styles.css"/>
			
 
				+  <script>
			
 
				+    function getCurrentState() {
			
 
				+      return "California";
			
 
				+    }
			
 
				+  </script>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Including JavaScript values with <code>hx-vals</code></h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+  <label for="search">Search Contacts:</label>
			
 
				+  <input id="search" name="q" type="search" placeholder="Search Contacts">
			
 
				+  <button hx-get="/search"
			
 
				+          hx-target="#main .results"
			
 
				+          hx-include="#search"
			
 
				+          hx-vals='js:{"state":getCurrentState()}'>
			
 
				+    Search The Contacts
			
 
				+  </button>
			
 
				+  <div class="results"></div>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/08.html
+++ b/web/public/08.html
@@ -0,0 +1,34 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+  <meta charset="UTF-8">
			
 
				+  <title id="page-title">HTMX Demos</title>
			
 
				+  <script src="htmx-1-9-12.min.js"></script>
			
 
				+  <link rel="stylesheet" href="styles.css"/>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1 id="title">Demo</h1>
			
 
				+<h2>Using history with <code>hx-push-url</code></h2>
			
 
				+
			
 
				+<nav hx-get="/autonum/nav" hx-trigger="load"></nav>
			
 
				+
			
 
				+<div id="main">
			
 
				+  <label for="search">Search Contacts:</label>
			
 
				+  <input id="search" name="q" type="search" placeholder="Search Contacts">
			
 
				+  <button hx-get="/search"
			
 
				+          hx-target="#main .results"
			
 
				+          hx-include="#search"
			
 
				+          hx-push-url="true"
			
 
				+  >
			
 
				+    Search The Contacts
			
 
				+  </button>
			
 
				+  <div class="results"></div>
			
 
				+  <p>Usage:</p>
			
 
				+  <ul>
			
 
				+    <li>search on some criteria a couple of times,</li>
			
 
				+    <li>then use the browser &larr;/&rarr; buttons button. Yay ! 😊</li>
			
 
				+    <li>Now refresh the page. Boo 😕 : we get only the partial response, because the pushed URL is the one for the <code>hx-post</code></li>
			
 
				+  </ul>
			
 
				+</div>
			
 
				+</body>
			
 
				+</html>
			
--- a/web/public/contacts.gohtml
+++ b/web/public/contacts.gohtml
@@ -0,0 +1,10 @@
 
				+{{ define "contacts" }}
			
 
				+  {{ if .state }}<p>Results in {{ .state }}</p>{{ end }}
			
 
				+  <ul>{{ range $name, $mail := .contacts }}
			
 
				+      <li><a href="mailto:{{$mail}}">{{ $name }}</a></li>
			
 
				+      {{- else -}}
			
 
				+        <li><em>No results found</em></li>
			
 
				+      {{ end }}
			
 
				+  </ul>
			
 
				+  {{ if .counter }}<p>Counter: {{ .counter }}</p>{{ end }}
			
 
				+{{ end }}
			
--- a/web/public/head-support.js
+++ b/web/public/head-support.js
@@ -0,0 +1,141 @@
 
				+//==========================================================
			
 
				+// head-support.js
			
 
				+//
			
 
				+// An extension to htmx 1.0 to add head tag merging.
			
 
				+//==========================================================
			
 
				+(function(){
			
 
				+
			
 
				+    var api = null;
			
 
				+
			
 
				+    function log() {
			
 
				+        //console.log(arguments);
			
 
				+    }
			
 
				+
			
 
				+    function mergeHead(newContent, defaultMergeStrategy) {
			
 
				+
			
 
				+        if (newContent && newContent.indexOf('<head') > -1) {
			
 
				+            const htmlDoc = document.createElement("html");
			
 
				+            // remove svgs to avoid conflicts
			
 
				+            var contentWithSvgsRemoved = newContent.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');
			
 
				+            // extract head tag
			
 
				+            var headTag = contentWithSvgsRemoved.match(/(<head(\s[^>]*>|>)([\s\S]*?)<\/head>)/im);
			
 
				+
			
 
				+            // if the  head tag exists...
			
 
				+            if (headTag) {
			
 
				+
			
 
				+                var added = []
			
 
				+                var removed = []
			
 
				+                var preserved = []
			
 
				+                var nodesToAppend = []
			
 
				+
			
 
				+                htmlDoc.innerHTML = headTag;
			
 
				+                var newHeadTag = htmlDoc.querySelector("head");
			
 
				+                var currentHead = document.head;
			
 
				+
			
 
				+                if (newHeadTag == null) {
			
 
				+                    return;
			
 
				+                } else {
			
 
				+                    // put all new head elements into a Map, by their outerHTML
			
 
				+                    var srcToNewHeadNodes = new Map();
			
 
				+                    for (const newHeadChild of newHeadTag.children) {
			
 
				+                        srcToNewHeadNodes.set(newHeadChild.outerHTML, newHeadChild);
			
 
				+                    }
			
 
				+                }
			
 
				+
			
 
				+
			
 
				+
			
 
				+                // determine merge strategy
			
 
				+                var mergeStrategy = api.getAttributeValue(newHeadTag, "hx-head") || defaultMergeStrategy;
			
 
				+
			
 
				+                // get the current head
			
 
				+                for (const currentHeadElt of currentHead.children) {
			
 
				+
			
 
				+                    // If the current head element is in the map
			
 
				+                    var inNewContent = srcToNewHeadNodes.has(currentHeadElt.outerHTML);
			
 
				+                    var isReAppended = currentHeadElt.getAttribute("hx-head") === "re-eval";
			
 
				+                    var isPreserved = api.getAttributeValue(currentHeadElt, "hx-preserve") === "true";
			
 
				+                    if (inNewContent || isPreserved) {
			
 
				+                        if (isReAppended) {
			
 
				+                            // remove the current version and let the new version replace it and re-execute
			
 
				+                            removed.push(currentHeadElt);
			
 
				+                        } else {
			
 
				+                            // this element already exists and should not be re-appended, so remove it from
			
 
				+                            // the new content map, preserving it in the DOM
			
 
				+                            srcToNewHeadNodes.delete(currentHeadElt.outerHTML);
			
 
				+                            preserved.push(currentHeadElt);
			
 
				+                        }
			
 
				+                    } else {
			
 
				+                        if (mergeStrategy === "append") {
			
 
				+                            // we are appending and this existing element is not new content
			
 
				+                            // so if and only if it is marked for re-append do we do anything
			
 
				+                            if (isReAppended) {
			
 
				+                                removed.push(currentHeadElt);
			
 
				+                                nodesToAppend.push(currentHeadElt);
			
 
				+                            }
			
 
				+                        } else {
			
 
				+                            // if this is a merge, we remove this content since it is not in the new head
			
 
				+                            if (api.triggerEvent(document.body, "htmx:removingHeadElement", {headElement: currentHeadElt}) !== false) {
			
 
				+                                removed.push(currentHeadElt);
			
 
				+                            }
			
 
				+                        }
			
 
				+                    }
			
 
				+                }
			
 
				+
			
 
				+                // Push the tremaining new head elements in the Map into the
			
 
				+                // nodes to append to the head tag
			
 
				+                nodesToAppend.push(...srcToNewHeadNodes.values());
			
 
				+                log("to append: ", nodesToAppend);
			
 
				+
			
 
				+                for (const newNode of nodesToAppend) {
			
 
				+                    log("adding: ", newNode);
			
 
				+                    var newElt = document.createRange().createContextualFragment(newNode.outerHTML);
			
 
				+                    log(newElt);
			
 
				+                    if (api.triggerEvent(document.body, "htmx:addingHeadElement", {headElement: newElt}) !== false) {
			
 
				+                        currentHead.appendChild(newElt);
			
 
				+                        added.push(newElt);
			
 
				+                    }
			
 
				+                }
			
 
				+
			
 
				+                // remove all removed elements, after we have appended the new elements to avoid
			
 
				+                // additional network requests for things like style sheets
			
 
				+                for (const removedElement of removed) {
			
 
				+                    if (api.triggerEvent(document.body, "htmx:removingHeadElement", {headElement: removedElement}) !== false) {
			
 
				+                        currentHead.removeChild(removedElement);
			
 
				+                    }
			
 
				+                }
			
 
				+
			
 
				+                api.triggerEvent(document.body, "htmx:afterHeadMerge", {added: added, kept: preserved, removed: removed});
			
 
				+            }
			
 
				+        }
			
 
				+    }
			
 
				+
			
 
				+    htmx.defineExtension("head-support", {
			
 
				+        init: function(apiRef) {
			
 
				+            // store a reference to the internal API.
			
 
				+            api = apiRef;
			
 
				+
			
 
				+            htmx.on('htmx:afterSwap', function(evt){
			
 
				+                var serverResponse = evt.detail.xhr.response;
			
 
				+                if (api.triggerEvent(document.body, "htmx:beforeHeadMerge", evt.detail)) {
			
 
				+                    mergeHead(serverResponse, evt.detail.boosted ? "merge" : "append");
			
 
				+                }
			
 
				+            })
			
 
				+
			
 
				+            htmx.on('htmx:historyRestore', function(evt){
			
 
				+                if (api.triggerEvent(document.body, "htmx:beforeHeadMerge", evt.detail)) {
			
 
				+                    if (evt.detail.cacheMiss) {
			
 
				+                        mergeHead(evt.detail.serverResponse, "merge");
			
 
				+                    } else {
			
 
				+                        mergeHead(evt.detail.item.head, "merge");
			
 
				+                    }
			
 
				+                }
			
 
				+            })
			
 
				+
			
 
				+            htmx.on('htmx:historyItemCreated', function(evt){
			
 
				+                var historyItem = evt.detail.item;
			
 
				+                historyItem.head = document.head.outerHTML;
			
 
				+            })
			
 
				+        }
			
 
				+    });
			
 
				+
			
 
				+})()
			
--- a/web/public/htmx-1-9-12.min.js
+++ b/web/public/htmx-1-9-12.min.js
--- a/web/public/nav.gohtml
+++ b/web/public/nav.gohtml
@@ -0,0 +1,11 @@
 
				+{{ define "nav" }}
			
 
				+    <ul>
			
 
				+        {{ if gt .num 0 }}
			
 
				+            <li><a href="/{{.prev}}.html">Previous</a></li>
			
 
				+        {{ end }}
			
 
				+        <li><a href="/{{.next}}.html">Next</a></li>
			
 
				+    </ul>
			
 
				+    {{/* Piggy-back title updates on the NAV swap to avoid extra requests */}}
			
 
				+    <h1 id="title" hx-swap-oob="true">Demo {{ .curr }}</h1>
			
 
				+    <title id="page title" hx-swap-oob="true">Demo {{ .curr }}</title>
			
 
				+{{ end }}
			
--- a/web/public/styles.css
+++ b/web/public/styles.css
@@ -0,0 +1,11 @@
 
				+nav ul, nav li {
			
 
				+    padding: 0;
			
 
				+}
			
 
				+
			
 
				+nav li {
			
 
				+    display: inline;
			
 
				+}
			
 
				+
			
 
				+button > ul {
			
 
				+    text-align: left;
			
 
				+}
			
--- a/web/web.go
+++ b/web/web.go
@@ -0,0 +1,102 @@
 
				+package web
			
 
				+
			
 
				+import (
			
 
				+	"errors"
			
 
				+	"fmt"
			
 
				+	"html/template"
			
 
				+	"net/http"
			
 
				+	"net/url"
			
 
				+	"path/filepath"
			
 
				+	"strconv"
			
 
				+	"strings"
			
 
				+)
			
 
				+
			
 
				+var (
			
 
				+	counter int = 1
			
 
				+)
			
 
				+
			
 
				+func getContacts() map[string]any {
			
 
				+	return map[string]any{
			
 
				+		"Joe":   "joe@example.com",
			
 
				+		"Sarah": "sarah@example.com",
			
 
				+		"Fred":  "fred@example.com",
			
 
				+	}
			
 
				+}
			
 
				+
			
 
				+func makeContacts1(templates *template.Template) http.HandlerFunc {
			
 
				+	return func(w http.ResponseWriter, r *http.Request) {
			
 
				+		templates.ExecuteTemplate(w, "contacts", map[string]any{
			
 
				+			"contacts": getContacts(),
			
 
				+			"counter":  counter,
			
 
				+		})
			
 
				+		counter++
			
 
				+	}
			
 
				+}
			
 
				+
			
 
				+func makeNav(templates *template.Template) http.HandlerFunc {
			
 
				+	return func(w http.ResponseWriter, r *http.Request) {
			
 
				+		path := strings.SplitAfterN(r.URL.Path, "/", 3)[2]
			
 
				+		htmlPath := r.Header.Get("Hx-Current-Url")
			
 
				+		u, err := url.Parse(htmlPath)
			
 
				+		if err != nil {
			
 
				+			http.Error(w, err.Error(), http.StatusBadRequest)
			
 
				+			return
			
 
				+		}
			
 
				+		htmlPath = strings.SplitAfterN(u.Path, "/", 2)[1]
			
 
				+		htmlPath = htmlPath[0 : len(htmlPath)-len(filepath.Ext(htmlPath))]
			
 
				+		num, err := strconv.Atoi(htmlPath)
			
 
				+		if err != nil {
			
 
				+			http.Error(w, err.Error(), http.StatusBadRequest)
			
 
				+			return
			
 
				+		}
			
 
				+		switch path {
			
 
				+		case "nav":
			
 
				+			templates.ExecuteTemplate(w, "nav", map[string]any{
			
 
				+				"num":  num,
			
 
				+				"prev": fmt.Sprintf("%02d", num-1),
			
 
				+				"curr": fmt.Sprintf("%2d", num),
			
 
				+				"next": fmt.Sprintf("%02d", num+1),
			
 
				+			})
			
 
				+		default:
			
 
				+			http.Error(w, path, http.StatusNotFound)
			
 
				+			return
			
 
				+		}
			
 
				+	}
			
 
				+}
			
 
				+
			
 
				+func makeSearch4(templates *template.Template) http.HandlerFunc {
			
 
				+	return func(w http.ResponseWriter, r *http.Request) {
			
 
				+		q := r.FormValue("q")
			
 
				+		state := r.FormValue("state")
			
 
				+		raw := getContacts()
			
 
				+		filtered := map[string]any{}
			
 
				+		for k, v := range raw {
			
 
				+			if strings.Contains(strings.ToUpper(k), strings.ToUpper(q)) {
			
 
				+				filtered[k] = v
			
 
				+			}
			
 
				+		}
			
 
				+		templates.ExecuteTemplate(w, "contacts", map[string]any{
			
 
				+			"contacts": filtered,
			
 
				+			"state":    state,
			
 
				+		})
			
 
				+	}
			
 
				+}
			
 
				+
			
 
				+func SetupRoutes(mux *http.ServeMux, templates *template.Template) {
			
 
				+	mux.Handle("/", http.FileServer(http.Dir("./web/public/")))
			
 
				+	mux.HandleFunc("/autonum/", makeNav(templates))
			
 
				+	mux.HandleFunc("/contacts", makeContacts1(templates))
			
 
				+	mux.HandleFunc("/search", makeSearch4(templates))
			
 
				+}
			
 
				+
			
 
				+func UI(addr string) error {
			
 
				+	templates := template.Must(template.ParseGlob("./web/public/*.gohtml"))
			
 
				+	mux := http.NewServeMux()
			
 
				+	SetupRoutes(mux, templates)
			
 
				+	if err := http.ListenAndServe(addr, mux); err != nil {
			
 
				+		if !errors.Is(err, http.ErrServerClosed) {
			
 
				+			return fmt.Errorf("http server error %w", err)
			
 
				+		}
			
 
				+	}
			
 
				+	return nil
			
 
				+}