JavaScript is inconsistent and buggy

Browser's high level structure

Rendering Engine

Trident - Internet Explorer

WebKit - Safari.

Gecko - Firefox

Blink - Chrome and Opera

• Spider Monkey - Mozilla

• V8 - Chrome

• Squirrel Fish - Safari

• Chakra - IE

Javascript Engines

EVOLUTION OF JS

First Ever Website

Tim Berners-Lee

European Organisation for Nuclear Research (CERN) in Geneva.

August, 1991

Brendan Eich

Jesse James Garrett

Ajax: A New Approach to Web Applications

Feb 2005

XmlHttpRequest

Who will help you??