Java Script
JavaScript (JS) is a dynamic computer programming language.It is most commonly used as part of web browsers, whose implementations allow client-side scripts to interact with the user, control the browser, communicate asynchronously, and alter thedocument content that is displayed.It is also being used in server-side programming, game development and the creation of desktop and mobile applications.
JavaScript was formalized
in the ECMAScript language
standard and is primarily used as part of a web browser (client-side
JavaScript). This
enables programmatic access
to computational objects within a host environment.
codes
Below is a minimal example
of a standards-conforming web page containing JavaScript (using HTML
5 syntax)
and the DOM:
<!DOCTYPE html>
<meta charset="utf-8">
<title>Minimal Example</title>
<h1 id="header">This is JavaScript</h1>
<script>
document.body.appendChild(document.createTextNode('Hello World!'));
var h1 = document.getElementById('header'); // holds a reference to the <h1> tag
h1 = document.getElementsByTagName('h1')[0]; // accessing the same <h1> element
</script>
<noscript>Your browser either does not support JavaScript, or has it turned off.</noscript>
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