Client-Side Scripts for Document Updating

This section provides an overview of client-side scripting. Some scripts are executed to update the page document final rendering. Some scripts are registered as event handler to be executed later.

Server-side scripting for page document updating happens in step 6 and 7a as shown in the diagram below:
Server-Side Scripts for Document Updating

Step 5: The Web server sends the final HTML document to the Web browser.

Step 6: The Client-side scripting step: The Web browser scans the HTML document for any client-side script code embedded in the document. The Web browser will remove the embedded script code and execute it. When the Web browser executes the embedded script code, it will provide many host objects representing the client host environment. Through those host objects, client-side script code can access the carrying HTML document and the browser windows. Client-side script code can not access the filesystem or anything outside the Web browser on the client machine for security reasons.

Step 7a: Some client-side scripts will update the page document object before it is rendered on the browser window.

Step 7b: Some client-side scripts will be registered as handlers for various events to be triggered on the browser window and it page UI controls. Those scripts will not be executed until their events are triggered by the end user.

Table of Contents

 About This Book

 Introduction to JavaScript

 ECMAScript Language Specification and JavaScript Dialects

 Data Types, Variables and Expressions

 Flow Control Statements

 Creating, Accessing, and Manipulating Arrays

 Defining and Calling Functions

 Web Browser Supporting JavaScript

Server-Side and Client-Side Web Scripting

 Web Scripting Architecture Overview

 Server-Side Scripting Overview

Client-Side Scripts for Document Updating

 Client-Side Scripts for Event Handling

 Client-Side Scripting Processed Multiple Times

 New Script Resulted from Two Original Scripts

 Introduction to Objects

 Defining Your Own Object Types

 Inheritance of Properties and Methods through the Prototype Object Chain

 'jrunscript' - JavaScript Shell Command from JDK

 Using Functions as "Function" Objects

 Introduction to Built-in Object Types

 W3C's Document Object Model (DOM) Specifications


 PDF Printing Version