javascript_tutorial

Table of Contents
About the Tutorial .............................................................................................................................................
Audience ........................................................................................................................................................... i
Prerequisites ..................................................................................................................................................... i
Copyright and Disclaimer ................................................................................................................................. i
Table of Contents ............................................................................................................................................ ii
PART 1: JAVASCRIPT BASICS ........................................................................................................ 1
1. JAVASCRIPT – Overview ............................................................................................................................ 2
What is JavaScript? .......................................................................................................................................... 2
Client-Side JavaScript....................................................................................................................................... 2
Advantages of JavaScript ................................................................................................................................. 3
Limitations of JavaScript .................................................................................................................................. 3
JavaScript Development Tools......................................................................................................................... 3
Where is JavaScript Today? ............................................................................................................................. 4
2. JAVASCRIPT – Syntax ................................................................................................................................ 5
Your First JavaScript Code ............................................................................................................................... 5
Whitespace and Line Breaks ............................................................................................................................ 6
Semicolons are Optional.................................................................................................................................. 6
Case Sensitivity ................................................................................................................................................ 7
Comments in JavaScript .................................................................................................................................. 7
3. JAVASCRIPT – Enabling ............................................................................................................................. 9
JavaScript in Internet Explorer ........................................................................................................................ 9
JavaScript in Firefox ......................................................................................................................................... 9
JavaScript in Chrome ..................................................................................................................................... 10
JavaScript in Opera ........................................................................................................................................ 10
Warning for Non-JavaScript Browsers ........................................................................................................... 10
4. JAVASCRIPT – Placement ........................................................................................................................ 12
JavaScript in <head>...</head> Section ......................................................................................................... 12
JavaScript in <body>...</body> Section ......................................................................................................... 13
JavaScript in <body> and <head> Sections .................................................................................................... 13
JavaScript in External File .............................................................................................................................. 14
5. JAVASCRIPT – Variables .......................................................................................................................... 16
JavaScript Datatypes...................................................................................................................................... 16
JavaScript Variables ....................................................................................................................................... 16
JavaScript Variable Scope .............................................................................................................................. 17
JavaScript Variable Names ............................................................................................................................ 18
JavaScript Reserved Words ........................................................................................................................... 19
6. JAVASCRIPT – Operators ......................................................................................................................... 20
What is an Operator? .................................................................................................................................... 20
Arithmetic Operators..................................................................................................................................... 20
Comparison Operators .................................................................................................................................. 23
Logical Operators ........................................................................................................................................... 26
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