Knockoutjs.com - Hello World Example

http://knockoutjs.com/examples/helloWorld.html

by Salmin Skenderovic

HTML

<div class='liveExample' id="sectionOne">   
    <p>First name: <input data-bind='value: firstName' /></p> 
    <p>Last name: <input data-bind='value: lastName' /></p> 
    <h2>Hello, <span data-bind='text: firstName'> </span>!</h2>  
</div>

<div class='liveExample' id="sectionTwo">   
    <p>First name: <input data-bind='value: firstName' /></p> 
    <p>Last name: <input data-bind='value: lastName' /></p> 
    <h2>Hello, <span data-bind='text: firstName'> </span>!</h2>  
</div>

CSS

body { font-family: arial; font-size: 14px; }
.liveExample { padding: 1em; background-color: #EEEEDD; border: 1px solid #CCC; max-width: 655px; }
.liveExample input { font-family: Arial; }
.liveExample b { font-weight: bold; }
.liveExample p { margin-top: 0.9em; margin-bottom: 0.9em; }
.liveExample select[multiple] { width: 100%; height: 8em; }
.liveExample h2 { margin-top: 0.4em; font-weight: bold; font-size: 1.2em; }

JavaScript

// Here's my data model
var ViewModel1 = function(first, last) {
    this.firstName = ko.observable(first);
    this.lastName = ko.observable(last);
};
 
 var ViewModel2 = function(first, last) {
    this.firstName = ko.observable(first);
    this.lastName = ko.observable(last);
};
 
ko.applyBindings(new ViewModel1("Planet1", "Earth"), document.getElementById("sectionOne")); // This makes Knockout get to work
ko.applyBindings(new ViewModel2("Planet2", "Earth"), document.getElementById("sectionTwo")); // This makes Knockout get to work