Quick JavaScript

Cover....1 Half Title....2 Title Page....4 Copyright Page....5 Dedication....6 Table of Contents....8 Author....14 Preface....16 Versions of JavaScript....18 Chapter 1: Introduction....20 1.1 Hello, World!....20 1.2 JavaScript in the Browser....20 1.3 Browser Consoles....21 1.4 Running JavaScript....22 1.5 Getting Input....23 1.6 Producing Output....23 Chapter 2: JavaScript: The Bare Minimum....26 2.1 Comments....26 2.2 Data Types....27 2.2.1 Primitives....27 2.2.2 User-Defined Objects....28 2.2.3 Built-In Object Types....28 2.2.4 Arrays....28 2.2.5 Sets....30 2.2.6 Maps....30 2.2.7 Dates....31 2.2.8 Regular Expressions....33 2.3 Identifiers....36 2.4 let and const....36 2.5 var....37 2.6 Operators....38 2.7 Equality and Identity....40 2.8 Conversions....41 2.9 Statements....41 2.9.1 Semicolons....41 2.9.2 Declarations....42 2.9.3 Function Definitions....43 2.9.4 Familiar Statements....44 2.9.4.1 Assignment Statements....45 2.9.4.2 Expressions....46 2.9.4.3 Compound Statements....46 2.9.4.4 If Statements....47 2.9.4.5 While Loops....48 2.9.4.6 Do-While Loops....49 2.9.4.7 Traditional For Loops....50 2.9.4.8 Scope in Loops....51 2.9.4.9 Switch Statements....52 2.9.4.10 Labeled Statements....54 2.9.4.11 Break Statements....54 2.9.4.12 Continue Statements....55 2.9.4.13 Return Statements....56 2.9.4.14 Empty Statements....57 2.9.5 JavaScript-Specific Statements....57 2.9.5.1 For/of....57 2.9.5.2 For/in....58 2.9.5.3 Throw....58 2.9.5.4 Try-catch-finally....59 2.9.5.5 The with Statement....61 2.10 Example: Prime Numbers....61 2.11 Testing....62 2.11.1 The Mocha Test Framework....62 2.11.2 Testing with Chai....64 2.11.3 Testing Example....65 Chapter 3: JavaScript: In More Detail....68 3.1 Strict Mode....68 3.2 Identifiers....69 3.3 Destructuring....70 3.4 Data Types....72 3.4.1 Numbers....72 3.4.2 Strings....74 3.4.3 Booleans....75 3.4.4 Symbols....76 3.4.5 Arrays....78 3.4.6 Sparse Arrays....78 3.4.7 Sets....79 3.4.8 Maps....80 3.4.9 WeakMaps....81 3.4.10 Promises....82 3.4.11 Conversions....84 3.5 Math....86 3.6 Reserved Words....87 3.7 Good Operators....88 3.8 Operator Notes....90 3.9 Bad Operators....91 3.10 Functions....92 3.10.1 Defining Functions....92 3.10.2 Parameters and Arguments....94 3.10.3 Functions Are Data....96 3.10.4 Functions Are Objects....97 3.10.5 Function Methods....98 3.10.6 Closures....99 3.10.7 Generators....101 3.10.8 Iterators....102 3.11 Objects....104 3.11.1 Definition of Objects....104 3.11.2 Creating Objects....106 3.11.3 Copying Objects....109 3.11.4 Methods....110 3.11.5 Optional Chaining....110 3.11.6 This....111 3.11.7 Higher-Order Functions....112 3.11.8 Prototypes....114 3.11.9 Descriptors....115 3.11.10 Classes and Inheritance....117 3.11.10.1 Classes....117 3.11.10.2 Inheritance....121 3.11.10.3 Overriding Methods and Fields....124 3.11.10.4 Class Prototypes....125 3.12 Transpilers and Polyfills....126 3.13 JSON....127 Chapter 4: Client-Side JavaScript....128 4.1 Essential HTML....128 4.2 Adding JavaScript to HTML....129 4.3 DOM Overview....130 4.4 Graphical User Interfaces....132 4.4.1 Events....132 4.4.2 Widgets....132 4.4.3 Buttons....133 4.4.4 Finding Widgets....134 4.4.5 Text Fields....135 4.4.6 Buttons and Forms....136 4.4.7 Form Verification....139 4.4.8 Form Submission....140 4.4.8.1 Get Requests....140 4.4.8.2 Post Requests....141 4.4.8.3 Other Requests....141 4.4.9 Additional Text Widgets....141 4.4.10 Other Input Widgets....143 4.4.11 Events....144 4.4.12 Bubbling....148 4.5 Using the DOM....148 4.5.1 The Window Object....148 4.5.1.1 Window Properties....149 4.5.1.2 Window Methods....150 4.5.1.3 Window Example....151 4.5.2 The Document Object....153 4.5.2.1 Document Properties....153 4.5.2.2 Finding Nodes....154 4.5.2.3 Creating Nodes....156 4.5.3 Node Objects....157 4.5.3.1 Node Properties....157 4.5.3.2 Node Methods....158 4.5.4 Elements....159 4.5.4.1 Element Properties....159 4.5.4.2 Element Methods....159 4.5.5 CharacterData....161 4.5.6 Example: ShowTree....161 Afterword....166 Appendix A: Array Methods....168 Appendix B: Higher-Order Methods....170 Appendix C: String Methods....172 Appendix D: Regular Expressions....176 References....180 Index....182