front__coursera-responsive-design/assignment.js

const EVENT_TEMPLATES_LOADED = "templates:loaded";

const templateNames = [
  "class",
  "home",
  "species",
  "about"
];

const partialNames = [
  "nav"
];

const loadCount = templateNames.length + partialNames.length;

var templates = {};
var contentElement = document.getElementById("content");
var ready = false;

function checkLoad(target) {
  if (Object.keys(templates).length === loadCount) {
    ready = true;
    target.dispatchEvent(new Event(EVENT_TEMPLATES_LOADED));
  }
}

templateNames.forEach(function (name) {
  const path = "templates/" + name + ".hbs";

  $.get(path, function (data) {
    templates[name] = Handlebars.compile(data);
    checkLoad(contentElement);
  }, "html");
});

partialNames.forEach(function (name) {
  const path = "templates/" + name + ".hbs";
  $.get(path, function (data) {
    templates[name] = Handlebars.compile(data);
    Handlebars.registerPartial(name, templates[name]);
    checkLoad(contentElement);
  }, "html");
});