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todo-list_tutorial.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Hello World in Backbone.js</title>
<!-- ========= -->
<!-- CSS -->
<!-- ========= -->
<style type="text/css">
#todo-list input.edit {
display: none; /* Hides input box */
}
#todo-list .editing label {
display: none; /* Hides label text when .editing */
}
#todo-list .editing input.edit {
display: inline; /* Shows input text box when .editing */
}
</style>
</head>
<body>
<!-- ========= -->
<!-- Your HTML -->
<!-- ========= -->
<section id="todoapp">
<header id="header">
<h1>Todos</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>
<!-- ========= -->
<!-- Libraries -->
<!-- ========= -->
<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>
<!-- =============== -->
<!-- Javascript code -->
<!-- =============== -->
<script type="text/template" id="item-template">
<!-- ============== To-do View ============== -->
<!-- renders each of the todo model object -->
<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 type="text/javascript">
// your JS code goes here
var app = {}; // create namespace for our app
//--------------
// Models
//--------------
app.Todo = Backbone.Model.extend({
defaults: {
title: '',
completed: false
},
toggle: function() {
this.save({ completed: !this.get('completed') });
}
});
//--------------
// Collections
//--------------
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() );
}
});
// instance of the Collection
app.todoList = new app.TodoList();
//--------------
// Views
//--------------
// renders individual todo items list (li)
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.$('.edit');
return this; // enable chained calls
},
initialize: function() {
this.model.on('change', this.render, this);
this.model.on('destroy', this.remove, this); // remove: convenience Backbone function for removing views from DOM
},
events: {
'dblclick label' : 'edit',
'keypress .edit' : 'updateOnEnter',
'blur .edit' : 'close',
'click .toggle' : 'toggleCompleted',
'click .destroy' : 'destroy'
},
edit: function() {
this.$el.addClass('editing');
this.input.focus();
},
close: function() {
var value = this.input.val().trim();
if(value) {
this.model.save({title: value});
}
this.$el.removeClass('editing');
},
updateOnEnter: function(e) {
if(e.which == 13) {
this.close();
}
},
toggleCompleted: function() {
this.model.toggle();
},
destroy: function() {
this.model.destroy();
}
});
var object = {},
callback = function (msg) { console.log("Triggered " + msg); };
_.extend(object, Backbone.Events);
// Subscribe to Events object.on(event, callback, [context])
object.on("my_event", callback);
object.trigger("my_event", "my custom event");
// renders the full list of todo items calling TodoView for each one.
app.AppView = Backbone.View.extend({
el: '#todoapp',
initialize: function () {
this.input = this.$('#new-todo');
// when new elements are added to the collection render then with addOne
app.todoList.on('add', this.addOne, this);
app.todoList.on('reset', this.addAll, this);
app.todoList.fetch(); // Loads list from local storage
},
events: {
'keypress #new-todo': 'createTodoOnEnter'
},
createTodoOnEnter: function (e) {
if (e.which !== 13 || !this.input.val().trim()) { // ENTER_KEY = 13
return;
}
app.todoList.create(this.newAttributes());
this.input.val(''); // clean input box
},
addOne: function (todo) {
var view = new app.TodoView({ model: todo });
$('#todo-list').append(view.render().el);
console.log('adding ' + todo.get('title'));
},
addAll: function () {
this.$('#todo-list').html(''); // clean the todo list
console.log('cleaned list');
// filter todo item list
switch(window.filter) {
case 'pending':
_.each(app.todoList.remaining(), this.addOne);
break;
case 'completed':
_.each(app.todoList.completed(), this.addOne);
break;
default:
app.todoList.each(this.addOne, this);
break;
}
},
newAttributes: function () {
return {
title: this.input.val().trim(),
completed: false
}
}
});
//--------------
// Routers
//--------------
app.Router = Backbone.Router.extend({
routes: {
'*filter' : 'setFilter'
},
setFilter: function(params) {
console.log('app.router.params = ' + params);
window.filter = params.trim() || '';
app.todoList.trigger('reset');
}
});
//--------------
// Initializers
//--------------
app.router = new app.Router();
Backbone.history.start();
app.appView = new app.AppView();
</script>
</body>
</html>