JavaScript Pocket Reference

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JavaScript

Pocket Reference

The JavaScript Language

JavaScript is a lightweight, object-based scripting language

that can be embedded in HTML pages. This book starts with

coverage of the core JavaScript language, followed by mate-

rial on client-side JavaScript, as used in web browsers. The

final portion of this book is a quick-reference for the core

and client-side JavaScript APIs.

Syntax

JavaScript syntax is modeled on Java syntax, Java syntax, in

turn, is modeled on C and C++ syntax. Therefore, C, C++,

and Java programmers should find that JavaScript syntax is

comfortably familiar.

Case sensitivity

JavaScript is a case-sensitive language. All keywords are in

lowercase. All variables, function names, and other identifi-

ers must be typed with a consistent capitalization.

Whitespace

JavaScript ignores whitespace between tokens. You may use

spaces, tabs, and newlines to format and indent your code in

a readable fashion.

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JavaScript Pocket Reference

Semicolons

JavaScript statements are terminated by semicolons. When a

statement is followed by a newline, however, the terminat-

ing semicolon may be omitted. Note that this places a restric-

tion on where you may legally break lines in your JavaScript

programs: you may not break a statement across two lines if

the first line can be a complete legal statement ...