JavaScript Testing Prototype

## JS Basic

JS HOME JS Introduction JS How To JS Output JS Statements JS Comments JS Variables JS Data Types JS Objects JS Functions JS Operators JS Comparisons JS Conditions JS Switch JS Loop For JS Loop While JS Breaks JS Errors JS Validation

## JS Advanced

JS Object JS Number JS String JS Date JS Array JS Boolean JS Math JS RegExp

## JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM CSS DOM Events DOM Navigation DOM Nodes DOM Nodelist

## JS Browser BOM

JS Window JS Screen JS Location JS History JS Navigator JS PopupAlert JS Timing JS Cookies

## JS Libraries

JS Libraries JS jQuery JS Prototype

## JS Examples

JS Basic Examples JS Objects Examples JS DOM Examples JS HTML Examples JS Browser Examples JS Quiz JS Certificate JS Summary

## JS References

Javascript Objects HTML DOM Objects

# JavaScript - Testing Prototype

« Previous
Next Chapter »

Testing JavaScript Framework Libraries - Prototype

## Including Prototype

To test a JavaScript library, you need to include it in your web page.

To include a library, use the <script> tag with the src attribute set to the URL of the library:

## Including Prototype

<!DOCTYPE html>
<html>
<head>
<script
src="http://ajax.googleapis.com/ajax/libs/
prototype/1.7.1.0/prototype.js>
</script>
</head>
<body>
</body>
</html>

## Prototype Described

Prototype provides functions to make HTML DOM programming easier.

Like jQuery, Prototype has its $() function.

The $() function accepts HTML DOM element id values (or DOM elements), and adds new functionality to DOM objects.

Unlike jQuery, Prototype has no ready() method to take the place of window.onload(). Instead, Prototype adds extensions to the browser and the HTML DOM.

In JavaScript, you can assign a function to handle the window’s load event:

## The JavaScript Way:

function myFunction()
{
var obj=document.getElementById("h01");
obj.innerHTML="Hello Prototype";
}
onload=myFunction;

The Prototype equivalent is different:

## The Prototype Way:

function myFunction()
{
$("h01").insert("Hello Prototype!");
}
Event.observe(window,"load",myFunction);

Event.observe() accepts three arguments:

- The HTML DOM or BOM (Browser Object Model) object you want to handle
- The event you want to handle
- The function you want to call

## Testing Prototype

Try the following example:

## Example

<!DOCTYPE html>
<html>
<script
src="https://ajax.googleapis.com/ajax/libs/
prototype/1.7.1.0/prototype.js">
</script>
<script>
function myFunction()
{
$("h01").insert("Hello Prototype!");
}
Event.observe(window,"load",myFunction);
</script>
</head>
<body>
<h1 id="h01"></h1>
</body>
</html>
Try it yourself »

Also try this one:

## Example

<!DOCTYPE html>
<html>
<script
src="https://ajax.googleapis.com/ajax/libs/
prototype/1.7.1.0/prototype.js">
</script>
<script>
function myFunction()
{
$("h01").writeAttribute("style","color:red").insert("Hello Prototype!");
}
Event.observe(window,"load",myFunction);
</script>
</head>
<body>
<h1 id="h01"></h1>
</body>
</html>
Try it yourself »

As you can see from the example above, like jQuery, Prototype allows chaining.

Chaining is a handy way to perform multiple tasks on one object.

« Previous
Next Chapter »

## Your suggestion:

Your E-mail (optional):

Page address:

Description:

Close [X]

## Thank You For Helping Us!

Your message has been sent to W3Schools.

Close [X]
Search w3schools.com:

## WEB HOSTING

Best Web Hosting UK Reseller Hosting Wow! $5 SSD Hosting

## WEB BUILDING

Download XML Editor
FREE Website BUILDER FREE Website Creator

## WEB RESOURCES

Web Statistics Web Validation

## SHARE THIS PAGE