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Created April 2, 2012 17:58
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Backbone.js TODO app implemented in knockout.js
Raw
backbone.htm
<!DOCTYPE html>
<html lang="en">
<head>
<title>Backbone.js Todos</title>
<link rel="stylesheet" href="todos.css"/>
</head>
<body>
<div id="todoapp">
<header>
<h1>Todos</h1>
<input id="new-todo" type="text" placeholder="What needs to be done?">
</header>
<section id="main">
<input id="toggle-all" type="checkbox">
<label for="toggle-all">Mark all as complete</label>
<ul id="todo-list"></ul>
</section>
<footer>
<a id="clear-completed">Clear completed</a>
<div id="todo-count"></div>
</footer>
</div>
<div id="instructions">
Double-click to edit a todo.
</div>
<div id="credits">
Created by
<br />
<a href="http://jgn.me/">J&eacute;r&ocirc;me Gravel-Niquet</a>.
<br />Rewritten by: <a href="http://addyosmani.github.com/todomvc">TodoMVC</a>.
</div>
<script src="../../test/vendor/json2.js"></script>
<script src="../../test/vendor/jquery-1.7.1.js"></script>
<script src="../../test/vendor/underscore-1.3.1.js"></script>
<script src="../../backbone.js"></script>
<script src="../backbone-localstorage.js"></script>
<!-- Templates -->
<script type="text/template" id="item-template">
<div class="view">
<input class="toggle" type="checkbox" <%= done ? 'checked="checked"' : '' %> />
<label><%= title %></label>
<a class="destroy"></a>
</div>
<input class="edit" type="text" value="<%= title %>" />
</script>
<script type="text/template" id="stats-template">
<% if (done) { %>
<a id="clear-completed">Clear <%= done %> completed <%= done == 1 ? 'item' : 'items' %></a>
<% } %>
<div class="todo-count"><b><%= remaining %></b> <%= remaining == 1 ? 'item' : 'items' %> left</div>
</script>
<script>
$(function(){
var Todo = Backbone.Model.extend({
defaults: function() {
return {
title: "empty todo...",
order: Todos.nextOrder(),
done: false
};
},
initialize: function() {
if (!this.get("title")) {
this.set({"title": this.defaults.title});
}
},
toggle: function() {
this.save({done: !this.get("done")});
},
clear: function() {
this.destroy();
}
});
var TodoList = Backbone.Collection.extend({
model: Todo,
localStorage: new Store("todos-backbone"),
done: function() {
return this.filter(function(todo){ return todo.get('done'); });
},
remaining: function() {
return this.without.apply(this, this.done());
},
nextOrder: function() {
if (!this.length) return 1;
return this.last().get('order') + 1;
},
comparator: function(todo) {
return todo.get('order');
}
});
var Todos = new TodoList;
var TodoView = Backbone.View.extend({
tagName: "li",
template: _.template($('#item-template').html()),
events: {
"click .toggle" : "toggleDone",
"dblclick .view" : "edit",
"click a.destroy" : "clear",
"keypress .edit" : "updateOnEnter",
"blur .edit" : "close"
},
initialize: function() {
this.model.bind('change', this.render, this);
this.model.bind('destroy', this.remove, this);
},
render: function() {
this.$el.html(this.template(this.model.toJSON()));
this.$el.toggleClass('done', this.model.get('done'));
this.input = this.$('.edit');
return this;
},
toggleDone: function() {
this.model.toggle();
},
edit: function() {
this.$el.addClass("editing");
this.input.focus();
},
close: function() {
var value = this.input.val();
if (!value) this.clear();
this.model.save({title: value});
this.$el.removeClass("editing");
},
updateOnEnter: function(e) {
if (e.keyCode == 13) this.close();
},
clear: function() {
this.model.clear();
}
});
var AppView = Backbone.View.extend({
el: $("#todoapp"),
statsTemplate: _.template($('#stats-template').html()),
events: {
"keypress #new-todo": "createOnEnter",
"click #clear-completed": "clearCompleted",
"click #toggle-all": "toggleAllComplete"
},
initialize: function() {
this.input = this.$("#new-todo");
this.allCheckbox = this.$("#toggle-all")[0];
Todos.bind('add', this.addOne, this);
Todos.bind('reset', this.addAll, this);
Todos.bind('all', this.render, this);
this.footer = this.$('footer');
this.main = $('#main');
Todos.fetch();
},
render: function() {
var done = Todos.done().length;
var remaining = Todos.remaining().length;
if (Todos.length) {
this.main.show();
this.footer.show();
this.footer.html(this.statsTemplate({done: done, remaining: remaining}));
} else {
this.main.hide();
this.footer.hide();
}
this.allCheckbox.checked = !remaining;
},
addOne: function(todo) {
var view = new TodoView({model: todo});
this.$("#todo-list").append(view.render().el);
},
addAll: function() {
Todos.each(this.addOne);
},
createOnEnter: function(e) {
if (e.keyCode != 13) return;
if (!this.input.val()) return;
Todos.create({title: this.input.val()});
this.input.val('');
},
clearCompleted: function() {
_.each(Todos.done(), function(todo){ todo.clear(); });
return false;
},
toggleAllComplete: function () {
var done = this.allCheckbox.checked;
Todos.each(function (todo) { todo.save({'done': done}); });
}
});
var App = new AppView;
});
</script>
</body>
</html>
Raw
knockout.htm
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Knockout Demo: Todos</title>
<link href="todos.css" media="all" rel="stylesheet" type="text/css" />
<script src="jquery-1.6.1.js" type="text/javascript"></script>
<script src="jquery.tmpl.js" type="text/javascript"></script>
<script src="knockout-1.2.1.debug.js" type="text/javascript"></script>
</head>
<body>
<div id="todoapp">
<div class="title">
<h1>Todos</h1>
</div>
<div class="content">
<div id="create-todo">
<input id="new-todo" data-bind="value: current, event: { keyup: add}" placeholder="What needs to be done?"
type="text" />
<span class="ui-tooltip-top" style="display: none;">Press Enter to save this task</span>
</div>
<div id="todos">
<ul id="todo-list" data-bind="template: { name: 'todoitemtemplate', foreach: todos }">
</ul>
</div>
<div id="todo-stats" data-bind="template: { name: 'statstemplate'}">
</div>
</div>
</div>
<ul id="instructions">
<li>Double-click to edit a todo.</li>
</ul>
<div id="credits">
Created by
<br />
<a href="http://jgn.me/">J&eacute;r&ocirc;me Gravel-Niquet</a>
<br />
Modified to use knockout.js by
<br />
<a href="https://github.com/ashish01/knockoutjs-todos">Ashish Sharma</a>
</div>
<script id="todoitemtemplate" type="text/html">
<li>
<div data-bind="attr: { class : done() ? 'todo done' : 'todo'}">
<div class="display">
<input class="check" type="checkbox" data-bind="checked: done" />
<div class="todo-content" data-bind="text: content"></div>
<span class="todo-destroy" data-bind="click: viewModel.remove"></span>
</div>
<div class="edit">
<input class="todo-input" type="text" data-bind="value: content"/>
</div>
</div>
</li>
</script>
<script id="statstemplate" type="text/html">
<span class="todo-count" data-bind="visible: remaining().length > 0">
<span class="number" data-bind="text: remaining().length"></span>
<span class="word" data-bind="text: remaining().length == 1 ? 'item' : 'items'"></span> left.
</span>
<span class="todo-clear" data-bind="visible: done().length > 0">
<a href="#" data-bind="click: removeCompleted">
Clear <span class="number-done" data-bind="text: done().length"></span>
completed <span class="word-done"data-bind="text: done().length == 1 ? 'item' : 'items'"></span>
</a>
</span>
</script>
<script type="text/javascript">
var Todo = function (text) {
this.content = ko.observable(text);
this.order = ko.observable();
this.done = ko.observable(false);
}
var viewModel = {
todos: ko.observableArray(),
current: ko.observable(),
add: function (event) {
if (event.keyCode === 13) {
var newTodo = new Todo(this.current());
this.todos.push(newTodo);
this.current("");
}
},
remove: function (event) {
viewModel.todos.remove(this);
},
removeCompleted: function (event) {
viewModel.todos.removeAll(viewModel.done());
}
};
viewModel.remaining = ko.dependentObservable(function () {
return this.todos().filter(function (el) {
return el.done() === false;
});
}, viewModel),
viewModel.done = ko.dependentObservable(function () {
return this.todos().filter(function (el) {
return el.done() === true;
});
}, viewModel),
ko.applyBindings(viewModel);
</script>
</body>
</html>
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