WHAT JAVASCRIPT IS ALL ABOUT

by **Admin** Tue Jul 28, 2015 5:52 pm

JavaScript is the most popular programming language in the world.
This page contains some examples of what JavaScript can do.

JavaScript Can Change HTML Content

One of many HTML methods

isdocument.getElementById().
This example "finds" the HTML element with id="demo", and changes its content (innerHTML):

Example

Code:: document.getElementById("demo").innerHTML = "Hello JavaScript";

JavaScript Can Change HTML Attributes

This example changes an HTML image, by changing the src attribute of an <img> tag:

JavaScript Can Change HTML Styles (CSS)

Changing the style of an HTML element, is a variant of changing an HTML attribute:

Example

Code:: document.getElementById("demo").style.fontSize = "25px";

JavaScript Can Validate Data

JavaScript is often used to validate input

Did You Know?

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JavaScript and Java are completely different languages, both in concept and design.

JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in 1997.

ECMA-262 is the official name. ECMAScript 5 (JavaScript 1.8.5 - July 2010) is the latest standard.

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