Knockout Simple

by jamey777

HTML

<script src="https://github.com/downloads/SteveSanderson/knockout/knockout-1.3.0beta.js"></script>
Name: <input type="text" data-bind="value: name, valueUpdate: 'afterkeydown'">
<input type="checkbox" data-bind="checked: nameVisible"/>
<p>
    Hello, <span data-bind="text: name, visible: nameVisible"></span>
    <br>
    <span data-bind="text: displayName"></span>
</p>
<button data-bind="click: changeName">Change Name</button>

JavaScript

$(function() {
    var viewModel = {
        name: ko.observable("bob"),
        changeName: function(){
            this.name("steve");
        },
        nameVisible: ko.observable(true)
    };
    viewModel.displayName = ko.dependentObservable(function() {
        return this.name() + " is" + (!this.nameVisible() ? " not" : "") + " visible.";
    }, viewModel);
    ko.applyBindings(viewModel);
});