learning-backbone/final_demo.html at master · hchiam/learning-backbone · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <title>To-do App in Backbone.js</title>
    <style type="text/css">
      #todo_app ul {
        list-style-type: none; /* hide bullets */
      }
      #todo_list input.edit {
        display: none; /* hide input box */
      }
      #todo_list .editing label {
        display: none; /* hide label when editing */
      }
      #todo_list .editing input.edit {
        display: inline; /* show input box when editing */
      }
    </style>
  </head>
  <body>
    <section id="todo_app">
      <header id="header">
        <h1>To-do's</h1>
        <input id="new_todo" placeholder="What needs to be done?" autofocus />
        <div>
          <a href="#/">show all</a> | <a href="#/pending">show pending</a> |
          <a href="#/completed">show completed</a>
        </div>
      </header>
      <section id="main">
        <ul id="todo_list"></ul>
      </section>
    </section>

    <!-- template: -->
    <script type="text/template" id="item_template">
      <div class="view">
        <input class="toggle" type="checkbox" <%= completed ? 'checked' : '' %>>
        <label><%- title %></label>
        <input class="edit" value="<%- title %>">
        <button class="destroy">remove</button>
      </div>
    </script>

    <script
      src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"
      type="text/javascript"
    ></script>
    <script
      src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js"
      type="text/javascript"
    ></script>
    <script
      src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js"
      type="text/javascript"
    ></script>
    <script
      src="http://cdnjs.cloudflare.com/ajax/libs/backbone-localstorage.js/1.0/backbone.localStorage-min.js"
      type="text/javascript"
    ></script>

    <script type="text/javascript">
      "use strict";
      var app = {}; // namespace

      // model:

      app.Todo = Backbone.Model.extend({
        defaults: {
          title: "",
          completed: false,
        },
        toggle: function () {
          this.save({ completed: !this.get("completed") });
        },
      });

      // collection:

      app.TodoList = Backbone.Collection.extend({
        model: app.Todo,
        localStorage: new Store("backbone-todo"),
        completed: function () {
          return this.filter(function (todo) {
            return todo.get("completed");
          });
        },
        remaining: function () {
          return this.without.apply(this, this.completed());
        },
      });
      app.todoList = new app.TodoList(); // collection instance

      // view: (sub-view/sub-element)

      app.TodoView = Backbone.View.extend({
        tagName: "li",
        template: _.template($("#item_template").html()),
        render: function () {
          this.$el.html(this.template(this.model.toJSON()));
          this.input = this.$(".edit");
          return this; // enable chained calls
        },
        initialize: function () {
          this.model.on("change", this.render, this);
          this.model.on("destroy", this.remove, this); // when removing view from DOM
        },
        // delegated events:
        events: {
          "dblclick label": "edit",
          "keypress .edit": "updateOnEnter",
          "blur .edit": "close",
          "click .toggle": "toggleCompleted",
          "click .destroy": "destroy",
        },
        edit: function () {
          this.$el.addClass("editing");
          this.input.focus();
        },
        updateOnEnter: function (e) {
          var hitEnter = e.which === 13;
          if (hitEnter) {
            this.close();
          }
        },
        close: function () {
          var value = this.input.val().trim();
          if (value) {
            this.model.save({ title: value });
          }
          this.$el.removeClass("editing");
        },
        toggleCompleted: function () {
          this.model.toggle();
        },
        destroy: function () {
          this.model.destroy();
        },
      });

      // view: (app element/view)

      app.AppView = Backbone.View.extend({
        el: "#todo_app",
        initialize: function () {
          this.input = this.$("#new_todo");
          app.todoList.on("add", this.addOne, this);
          app.todoList.on("reset", this.addAll, this);
          app.todoList.fetch(); // get collection from local storage
        },

        // example delegated event for .on('keypress', '#new_todo' :
        events: {
          "keypress #new_todo": "createTodoOnEnter",
        },
        createTodoOnEnter: function (e) {
          var hitEnterKey = e.which === 13;
          var emptyInput = !this.input.val().trim();
          if (!hitEnterKey || emptyInput) {
            return;
          }
          app.todoList.create(this.newAttributes());
          this.input.val("");
        },

        // other events:
        addAll: function () {
          this.$("#todo_list").html("");
          switch (window.filter) {
            case "pending":
              // add each filtered model in collection:
              _.each(app.todoList.remaining(), this.addOne);
              break;
            case "completed":
              // add each filtered model in collection:
              _.each(app.todoList.completed(), this.addOne);
              break;
            default:
              // add all models in collection:
              app.todoList.each(this.addOne, this);
              break;
          }
        },
        addOne: function (todo) {
          var view = new app.TodoView({ model: todo });
          $("#todo_list").append(view.render().el);
        },
        newAttributes: function () {
          return {
            title: this.input.val().trim(),
            completed: false,
          };
        },
      });

      // router:

      app.Router = Backbone.Router.extend({
        // some-path/:filter
        routes: {
          "*filter": "setFilter", // setFilter is a callback function!
        },
        setFilter: function (params) {
          console.log("app.router.params = " + params);
          // set a global variable on the window object:
          window.filter = params.trim() || "";
          // trigger an event on the collection:
          app.todoList.trigger("reset");
        },
      });

      // initializers:

      app.router = new app.Router();
      Backbone.history.start();
      app.appView = new app.AppView();
    </script>
  </body>
</html>