(function() {
//a custom binding to handle the enter key (could go in a separate library)
ko.bindingHandlers.enterKey = {
init: function(element, valueAccessor, allBindingsAccessor, data) {
var wrappedHandler, newValueAccessor;
//wrap the handler with a check for the enter key
wrappedHandler = function(data, event) {
if (event.keyCode === 13) {
valueAccessor().call(this, data, event);
}
};
//create a valueAccessor with the options that we would want to pass to the event binding
newValueAccessor = function() {
return {
keyup: wrappedHandler
};
};
//call the real event binding's init function
ko.bindingHandlers.event.init(element, newValueAccessor, allBindingsAccessor, data);
}
};
//represent a single todo item
var Todo = function(content, done) {
this.content = ko.observable(content);
this.done = ko.observable(done);
this.editing = ko.observable(false);
};
//can place methods on prototype, as there can be many todos
ko.utils.extend(Todo.prototype, {
edit: function() {
this.editing(true);
},
stopEditing: function() {
this.editing(false);
}
});
//our main view model
var ViewModel = function(todos) {
var self = this;
//map array of passed in todos to an observableArray of Todo objects
self.todos = ko.observableArray(ko.utils.arrayMap(todos, function(todo) {
return new Todo(todo.content, todo.done);
}));
//store the new todo value being entered
self.current = ko.observable();
//add a new todo, when enter key is pressed
self.add = function(data, event) {
var newTodo = new Todo(self.current());
self.todos.push(newTodo);
self.current("");
};
//remove a single todo
self.remove = function(todo) {
self.todos.remove(todo);
};
//remove all completed todos
self.removeCompleted = function() {
self.todos.remove(function(todo) {
return todo.done();
});
};
//count of all completed todos
self.completedCount = ko.computed(function() {
return ko.utils.arrayFilter(self.todos(), function(todo) {
return todo.done();
}).length;
});
//count of todos that are not complete
self.remainingCount = ko.computed(function() {
return self.todos().length - self.completedCount();
});
//writeable computed observable to handle marking all complete/incomplete
self.allCompleted = ko.computed({
//always return true/false based on the done flag of all todos
read: function() {
return !self.remainingCount();
},
//set all todos to the written value (true/false)
write: function(newValue) {
ko.utils.arrayForEach(self.todos(), function(todo) {
//set even if value is the same, as subscribers are not notified in that case
todo.done(newValue);
});
}
});
//track whether the tooltip should be shown
self.showTooltip = ko.observable(false);
self.showTooltip.setTrue = function() {
self.showTooltip(true);
}; //avoid an anonymous function each time
//watch the current value
self.current.subscribe(function(newValue) {
//if the value was just updated, then the tooltip should not be shown
self.showTooltip(false);
//clear the current timer, as it is actively being updated
if (self.showTooltip.timer) {
clearTimeout(self.showTooltip.timer);
}
//if there is a value and then show the tooltip after 1 second
if (newValue) {
self.showTooltip.timer = setTimeout(self.showTooltip.setTrue, 1000);
}
});
//helper function to keep expressions out of markup
self.getLabel = function(count) {
return ko.utils.unwrapObservable(count) === 1 ? "item" : "items";
};
//internal computed observable that fires whenever anything changes in our todos
ko.computed(function() {
//get a clean copy of the todos, which also creates a dependency on the observableArray and all observables in each item
var todos = ko.toJS(self.todos);
//store to local storage
amplify.store("todos-knockout", todos);
}).extend({
throttle: 1000
}); //save at most once per second
};
//check local storage for todos
var todos = amplify.store("todos-knockout");
//bind a new instance of our view model to the page
ko.applyBindings(new ViewModel(todos || []));
})();
<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, valueUpdate: 'afterkeydown', enterKey: add" placeholder="What needs to be done?" />
<span class="ui-tooltip-top" data-bind="visible: showTooltip" style="display: none;">Press Enter to save this task</span>
</div>
<div id="todos">
<div data-bind="visible: todos().length">
<input id="check-all" class="check" type="checkbox" data-bind="checked: allCompleted" />
<label for="check-all">Mark all as complete</label>
</div>
<ul id="todo-list" data-bind="foreach: todos">
<li data-bind="css: { editing: editing }">
<div class="todo" data-bind="css: { done : done }">
<div class="display">
<input class="check" type="checkbox" data-bind="checked: done" />
<div class="todo-content" data-bind="text: content, event: { dblclick: edit }" style="cursor: pointer;"></div>
<span class="todo-destroy" data-bind="click: $root.remove"></span>
</div>
<div class="edit">
<input class="todo-input" data-bind="value: content, valueUpdate: 'afterkeydown', enterKey: stopEditing, event: { blur: stopEditing }"/>
</div>
</div>
</li>
</ul>
</div>
<div id="todo-stats">
<span class="todo-count" data-bind="visible: remainingCount">
<span class="number" data-bind="text: remainingCount"></span>
<span class="word" data-bind="text: getLabel(remainingCount)"></span> left.
</span>
<span class="todo-clear" data-bind="visible: completedCount">
<a href="#" data-bind="click: removeCompleted">
Clear <span class="number-done" data-bind="text: completedCount"></span>
completed <span class="word-done" data-bind="text: getLabel(completedCount)"></span>
</a>
</span>
</div>
</div>
</div>
<ul id="instructions">
<li data-bind="visible: todos().length">Double-click to edit a todo.</li>
</ul>
<div id="credits">
Created by
<br />
<a href="http://jgn.me/">Jérôme Gravel-Niquet</a>
<br />
Modified to use knockout.js by
<br />
<a href="https://github.com/ashish01/knockoutjs-todos">Ashish Sharma</a>
<br/>
Updated to use knockout.js 2.0 by
<br/>
<a href="http://knockmeout.net">Ryan Niemeyer</a>
<br />
Patches/fixes for cross-browser compat:
<br />
<a href="http://twitter.com/addyosmani">Addy Osmani</a>
</div>
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
margin: 0;
padding: 0;
border: 0;
outline: 0;
font-weight: inherit;
font-style: inherit;
font-size: 100%;
font-family: inherit;
vertical-align: baseline;
}
body {
line-height: 1;
color: black;
background: white;
}
ol, ul {
list-style: none;
}
a img {
border: none;
}
html {
background: #eeeeee;
}
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 14px;
line-height: 1.4em;
background: #eeeeee;
color: #333333;
}
#todoapp {
width: 480px;
margin: 0 auto 40px;
background: white;
padding: 20px;
-moz-box-shadow: rgba(0, 0, 0, 0.2) 0 5px 6px 0;
-webkit-box-shadow: rgba(0, 0, 0, 0.2) 0 5px 6px 0;
-o-box-shadow: rgba(0, 0, 0, 0.2) 0 5px 6px 0;
box-shadow: rgba(0, 0, 0, 0.2) 0 5px 6px 0;
-moz-border-radius: 0 0 5px 5px;
-o-border-radius: 0 0 5px 5px;
-webkit-border-radius: 0 0 5px 5px;
border-radius: 0 0 5px 5px;
}
#todoapp h1 {
font-size: 36px;
font-weight: bold;
text-align: center;
padding: 20px 0 30px 0;
line-height: 1;
}
#create-todo {
position: relative;
}
#create-todo input {
width: 466px;
font-size: 24px;
font-family: inherit;
line-height: 1.4em;
border: 0;
outline: none;
padding: 6px;
border: 1px solid #999999;
-moz-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
-webkit-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
-o-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
}
#create-todo input::-webkit-input-placeholder {
font-style: italic;
}
#create-todo span {
position: absolute;
z-index: 999;
width: 170px;
left: 50%;
margin-left: -85px;
}
#todo-list {
margin-top: 10px;
}
#todo-list li {
padding: 12px 20px 11px 0;
position: relative;
font-size: 24px;
line-height: 1.1em;
border-bottom: 1px solid #cccccc;
}
#todo-list li:after {
content: "\0020";
display: block;
height: 0;
clear: both;
overflow: hidden;
visibility: hidden;
}
#todo-list li.editing {
padding: 0;
border-bottom: 0;
}
#todo-list .editing .display,
#todo-list .edit {
display: none;
}
#todo-list .editing .edit {
display: block;
}
#todo-list .editing input {
width: 444px;
font-size: 24px;
font-family: inherit;
margin: 0;
line-height: 1.6em;
border: 0;
outline: none;
padding: 10px 7px 0px 27px;
border: 1px solid #999999;
-moz-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
-webkit-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
-o-box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
box-shadow: rgba(0, 0, 0, 0.2) 0 1px 2px 0 inset;
}
#todo-list .check {
position: relative;
top: 9px;
margin: 0 10px 0 7px;
float: left;
}
#todo-list .done .todo-content {
text-decoration: line-through;
color: #777777;
}
#todo-list .todo-destroy {
position: absolute;
right: 5px;
top: 14px;
display: none;
cursor: pointer;
width: 20px;
height: 20px;
background: url(https://github.com/addyosmani/todomvc/raw/master/architecture-examples/knockoutjs/css/destroy.png) no-repeat 0 0;
}
#todo-list li:hover .todo-destroy {
display: block;
}
#todo-list .todo-destroy:hover {
background-position: 0 -20px;
}
#todo-stats {
*zoom: 1;
margin-top: 10px;
color: #777777;
}
#todo-stats:after {
content: "\0020";
display: block;
height: 0;
clear: both;
overflow: hidden;
visibility: hidden;
}
#todo-stats .todo-count {
float: left;
}
#todo-stats .todo-count .number {
font-weight: bold;
color: #333333;
}
#todo-stats .todo-clear {
float: right;
}
#todo-stats .todo-clear a {
color: #777777;
font-size: 12px;
}
/* these two rules are overridden below. find ".todo-clear a" */
#todo-stats .todo-clear a:visited {
color: #777777;
}
#todo-stats .todo-clear a:hover, #todo-stats .todo-clear a:focus {
color: #336699;
}
#instructions {
width: 520px;
margin: 10px auto;
color: #777777;
text-shadow: rgba(255, 255, 255, 0.8) 0 1px 0;
text-align: center;
}
#instructions a {
color: #336699;
}
#credits {
width: 520px;
margin: 30px auto;
color: #999;
text-shadow: rgba(255, 255, 255, 0.8) 0 1px 0;
text-align: center;
}
#credits a {
color: #888;
}
/*
* François 'cahnory' Germain
*/
.ui-tooltip, .ui-tooltip-top, .ui-tooltip-right, .ui-tooltip-bottom, .ui-tooltip-left {
color:#ffffff;
cursor:normal;
display:-moz-inline-stack;
display:inline-block;
font-size:12px;
font-family:arial;
padding:.5em 1em;
position:relative;
text-align:center;
text-shadow:0 -1px 1px #111111;
-webkit-border-top-left-radius:4px ;
-webkit-border-top-right-radius:4px ;
-webkit-border-bottom-right-radius:4px ;
-webkit-border-bottom-left-radius:4px ;
-khtml-border-top-left-radius:4px ;
-khtml-border-top-right-radius:4px ;
-khtml-border-bottom-right-radius:4px ;
-khtml-border-bottom-left-radius:4px ;
-moz-border-radius-topleft:4px ;
-moz-border-radius-topright:4px ;
-moz-border-radius-bottomright:4px ;
-moz-border-radius-bottomleft:4px ;
border-top-left-radius:4px ;
border-top-right-radius:4px ;
border-bottom-right-radius:4px ;
border-bottom-left-radius:4px ;
-o-box-shadow:0 1px 2px #000000, inset 0 0 0 1px #222222, inset 0 2px #666666, inset 0 -2px 2px #444444;
-moz-box-shadow:0 1px 2px #000000, inset 0 0 0 1px #222222, inset 0 2px #666666, inset 0 -2px 2px #444444;
-khtml-box-shadow:0 1px 2px #000000, inset 0 0 0 1px #222222, inset 0 2px #666666, inset 0 -2px 2px #444444;
-webkit-box-shadow:0 1px 2px #000000, inset 0 0 0 1px #222222, inset 0 2px #666666, inset 0 -2px 2px #444444;
box-shadow:0 1px 2px #000000, inset 0 0 0 1px #222222, inset 0 2px #666666, inset 0 -2px 2px #444444;
background-color:#3b3b3b;
background-image:-moz-linear-gradient(top,#555555,#222222);
background-image:-webkit-gradient(linear,left top,left bottom,color-stop(0,#555555),color-stop(1,#222222));
filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#555555,EndColorStr=#222222);
-ms-filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#555555,EndColorStr=#222222);
}
.ui-tooltip:after, .ui-tooltip-top:after, .ui-tooltip-right:after, .ui-tooltip-bottom:after, .ui-tooltip-left:after {
content:"\25B8";
display:block;
font-size:2em;
height:0;
line-height:0;
position:absolute;
}
.ui-tooltip:after, .ui-tooltip-bottom:after {
color:#2a2a2a;
bottom:0;
left:1px;
text-align:center;
text-shadow:1px 0 2px #000000;
-o-transform:rotate(90deg);
-moz-transform:rotate(90deg);
-khtml-transform:rotate(90deg);
-webkit-transform:rotate(90deg);
width:100%;
}
.ui-tooltip-top:after {
bottom:auto;
color:#4f4f4f;
left:-2px;
top:0;
text-align:center;
text-shadow:none;
-o-transform:rotate(-90deg);
-moz-transform:rotate(-90deg);
-khtml-transform:rotate(-90deg);
-webkit-transform:rotate(-90deg);
width:100%;
}
.ui-tooltip-right:after {
color:#222222;
right:-0.375em;
top:50%;
margin-top:-.05em;
text-shadow:0 1px 2px #000000;
-o-transform:rotate(0);
-moz-transform:rotate(0);
-khtml-transform:rotate(0);
-webkit-transform:rotate(0);
}
.ui-tooltip-left:after {
color:#222222;
left:-0.375em;
top:50%;
margin-top:.1em;
text-shadow:0 -1px 2px #000000;
-o-transform:rotate(180deg);
-moz-transform:rotate(180deg);
-khtml-transform:rotate(180deg);
-webkit-transform:rotate(180deg);
}
/* new additions - cleanup required*/
/* line 109 */
#todoapp #todo-stats {
*zoom: 1;
margin-top: 10px;
color: #555555;
-moz-border-radius-bottomleft: 5px;
-webkit-border-bottom-left-radius: 5px;
-o-border-bottom-left-radius: 5px;
-ms-border-bottom-left-radius: 5px;
-khtml-border-bottom-left-radius: 5px;
border-bottom-left-radius: 5px;
-moz-border-radius-bottomright: 5px;
-webkit-border-bottom-right-radius: 5px;
-o-border-bottom-right-radius: 5px;
-ms-border-bottom-right-radius: 5px;
-khtml-border-bottom-right-radius: 5px;
border-bottom-right-radius: 5px;
background: #f4fce8;
border-top: 1px solid #ededed;
padding: 0 20px;
line-height: 36px;
}
/* line 22, /opt/ree/lib/ruby/gems/1.8/gems/compass-0.10.5/frameworks/compass/stylesheets/compass/utilities/general/_clearfix.scss */
#todoapp #todo-stats:after {
content: "\0020";
display: block;
height: 0;
clear: both;
overflow: hidden;
visibility: hidden;
}
/* line 118 */
#todoapp #todo-stats .todo-count {
float: left;
}
/* line 120 */
#todoapp #todo-stats .todo-count .number {
font-weight: bold;
color: #555555;
}
/* line 123 */
#todoapp #todo-stats .todo-clear {
float: right;
}
/* line 125 */
#todoapp #todo-stats .todo-clear a {
display: block;
line-height: 20px;
text-decoration: none;
-moz-border-radius: 12px;
-webkit-border-radius: 12px;
-o-border-radius: 12px;
-ms-border-radius: 12px;
-khtml-border-radius: 12px;
border-radius: 12px;
background: rgba(0, 0, 0, 0.1);
color: #555555;
font-size: 11px;
margin-top: 8px;
padding: 0 10px 1px;
-moz-box-shadow: rgba(0, 0, 0, 0.2) 0 -1px 0 0;
-webkit-box-shadow: rgba(0, 0, 0, 0.2) 0 -1px 0 0;
-o-box-shadow: rgba(0, 0, 0, 0.2) 0 -1px 0 0;
box-shadow: rgba(0, 0, 0, 0.2) 0 -1px 0 0;
}
/* line 136 */
#todoapp #todo-stats .todo-clear a:hover, #todoapp #todo-stats .todo-clear a:focus {
background: rgba(0, 0, 0, 0.15);
-moz-box-shadow: rgba(0, 0, 0, 0.3) 0 -1px 0 0;
-webkit-box-shadow: rgba(0, 0, 0, 0.3) 0 -1px 0 0;
-o-box-shadow: rgba(0, 0, 0, 0.3) 0 -1px 0 0;
box-shadow: rgba(0, 0, 0, 0.3) 0 -1px 0 0;
}
/* line 139 */
#todoapp #todo-stats .todo-clear a:active {
position: relative;
top: 1px;
}
External resources loaded into this fiddle: