JavaScript authoritative guide 1. Overview

Javascript:

1. Object-oriented, interpretive (non-compiled) programming language. A scripting language

2. Loosely typed language. A variable does not have to have a definite type. Property names in an object can be mapped to any property value

3. Raw data type: Numeric, String, Boolean; built-in support: array, date, regular Expression object

4. The client's javascript:javascript is embedded in the HTML Web page, and the script is run by the client computer, not the Web server running

5. Composition: formal standards, de facto standards, browser-based extensions (cross-browser compatibility)

6. Completely unrelated to Java, is scripted Java

7. A programming language with rich functions

Client JavaScript

1.JavaScript interpreter embedded in Web browser

2. Add behavior to Web content so that it is no longer static

3. Defining an event handle for a document (handler)

4. Content (HTML), Performance (CSS), Behavior (JavaScript) in separate files

JavaScript in other environments

1. A general purpose programming language that is not limited to web browsers.

2. Used to embed in any other application and provide scripting capabilities for the application

3.Web server, IIS Web server, Windows Scripting Host, Internet Explorer, Adobe Flash Player, Sun Java6.0

JavaScript authoritative guide 1. Overview