Mastering JavaScript

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Chapter 1 Let's see the following example: EN-VedA:~$ node >function greeter(){ x="World"l SyntaxError: Unexpected identifier at Object.exports.createScript (vm.js:44:10) at REPLServer.defaultEval (repl.js:117:23) at bound (domain.js:254:14) … After this error, you will have to restart. Still, it can help you try out small fragments of code a lot faster. Another tool that I personally use a lot is JS Bin (http://jsbin.com/). JS Bin provides you with a great set of tools to test JavaScript, such as syntax highlighting and runtime error detection. The following is a screenshot of JS Bin: Based on your preference, you can pick the tool that makes it easier to try out the code samples. Regardless of which tool you use, make sure that you type out every exercise in this book. [ 5 ] www.it-ebooks.info
JavaScript Primer Hello World No programming language should be published without a customary Hello World program—why should this book be any different? Type (don't copy and paste) the following code in JS Bin: function sayHello(what) { return "Hello " + what; } console.log(sayHello("world")); Your screen should look something as follows: An overview of JavaScript In a nutshell, JavaScript is a prototype-based scripting language with dynamic typing and first-class function support. JavaScript borrows most of its syntax from Java, but is also influenced by Awk, Perl, and Python. JavaScript is case-sensitive and white space-agnostic. Comments JavaScript allows single line or multiple line comments. The syntax is similar to C or Java: // a one line comment /* this is a longer, multi-line comment */ /* You can't /* nest comments */ SyntaxError */ [ 6 ] www.it-ebooks.info
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Page 3 and 4: Mastering JavaScript Copyright © 2
Page 5 and 6: About the Author Ved Antani is an A
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Page 9 and 10: Table of Contents The eval() method
Page 11 and 12: Table of Contents Runtime exception
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Page 15 and 16: Preface What this book covers Chapt
Page 17 and 18: Preface When we wish to draw your a
Page 19 and 20: Piracy Piracy of copyrighted materi
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Page 27 and 28: JavaScript Primer JavaScript suppor
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Page 31 and 32: JavaScript Primer One important thi
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Page 35 and 36: JavaScript Primer Here are some exa
Page 37 and 38: JavaScript Primer This is fine beca
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Page 41 and 42: JavaScript Primer One way is to put
Page 43 and 44: JavaScript Primer In this example,
Page 45 and 46: JavaScript Primer Strict equality i
Page 47 and 48: JavaScript Primer However, there ar
Page 49 and 50: JavaScript Primer What about arrays
Page 51 and 52: JavaScript Primer JavaScript style
Page 53 and 54: JavaScript Primer //Set off operato
Page 55 and 56: JavaScript Primer The following exa
Page 57 and 58: JavaScript Primer Naming Naming is
Page 59 and 60: JavaScript Primer You switch on the
Page 61 and 62: JavaScript Primer Once JSHint is in
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Page 65 and 66: Functions, Closures, and Modules As
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Functions, Closures, and Modules In
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Functions, Closures, and Modules Th
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Functions, Closures, and Modules re
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Functions, Closures, and Modules co
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Functions, Closures, and Modules An
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Functions, Closures, and Modules La
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Functions, Closures, and Modules Sh
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Functions, Closures, and Modules In
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Functions, Closures, and Modules re
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Data Structures and Manipulation Re
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Data Structures and Manipulation On
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Data Structures and Manipulation We
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Data Structures and Manipulation In
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Data Structures and Manipulation Th
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Data Structures and Manipulation Re
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Data Structures and Manipulation Ja
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Data Structures and Manipulation By
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Data Structures and Manipulation We
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Object-Oriented JavaScript When you
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Object-Oriented JavaScript } "first
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Object-Oriented JavaScript //Add a
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Object-Oriented JavaScript • When
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Object-Oriented JavaScript } // Pri
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Object-Oriented JavaScript Inherita
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Object-Oriented JavaScript function
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Object-Oriented JavaScript To have
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Object-Oriented JavaScript It does
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Object-Oriented JavaScript The foll
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Object-Oriented JavaScript aScienti
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JavaScript Patterns Design patterns
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JavaScript Patterns We are creating
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JavaScript Patterns Unlike other OO
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JavaScript Patterns You can see tha
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JavaScript Patterns You can add a m
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JavaScript Patterns Let's take a co
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JavaScript Patterns }; // This copi
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JavaScript Patterns //Push the deco
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JavaScript Patterns Subject.prototy
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JavaScript Patterns Models Models a
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JavaScript Patterns MVP is generall
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Testing and Debugging You will refr
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Testing and Debugging We will use J
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Testing and Debugging This is the J
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Testing and Debugging • toContain
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Testing and Debugging JavaScript de
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Testing and Debugging In this examp
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Testing and Debugging The most impo
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Testing and Debugging In the Source
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Testing and Debugging Summary Both
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ECMAScript 6 Shims or polyfills Pol
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ECMAScript 6 Using standalone brack
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ECMAScript 6 This would still print
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ECMAScript 6 Object literals Object
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ECMAScript 6 The final variation of
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ECMAScript 6 A variation of JavaScr
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ECMAScript 6 For..of loops ES6 adds
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ECMAScript 6 // with no arguments,
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DOM Manipulation and Events Accessi
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DOM Manipulation and Events The HTM
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DOM Manipulation and Events The adv
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DOM Manipulation and Events jQuery
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DOM Manipulation and Events We are
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DOM Manipulation and Events Before
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DOM Manipulation and Events In this
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DOM Manipulation and Events • err
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DOM Manipulation and Events You can
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DOM Manipulation and Events Here, w
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Server-Side JavaScript An asynchron
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Server-Side JavaScript Consider the
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Server-Side JavaScript If you want
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Server-Side JavaScript When you exe
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Server-Side JavaScript This fragmen
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Server-Side JavaScript var _server
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Server-Side JavaScript The geo modu
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Server-Side JavaScript Installing p
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Server-Side JavaScript There is a c
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Server-Side JavaScript The recorded
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Server-Side JavaScript Summary In t
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closures 66-70 command line interfa
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match from class of characters 77,
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W waterfall graph 220 weak equality
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HTML5 Boilerplate Web Development I
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