1, JavaScript Introduction

JavaScript：

The concept: a client-side scripting language

It runs on the client browser. Each - a browser has Javascript parsing engine

Scripting language: does not need to compile, directly executed can be resolved browser

Features:

You can enhance user interaction and html page html element can be controlled, so that a page has some dynamic effects, enhance the user experience

 

Javascript development history:

1. In 1992, Nombase company, developed the first door client-side scripting language, specifically for the form of validation. Name: C--, later renamed: ScriptEase

2. In 1995, Netscape (Netscape) company, has developed a client-side scripting language camp: Livescript. Later, the company's experts invited SUN, modify LiveScript, named for JavaScript.

3. In 1996, Microsoft developed a plagiarism Javascript JScript language camp

4. In 1997, ECMA (European Computer Manufacturers Association), ECMAScript, is the standard for all client-side scripting language.

* JavaScript = ECMAScript + JavaScript own unique stuff (BOM + DOM)