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JavaScript Absolute Beginner's Guide, 2nd Edition

Name: JavaScript Absolute Beginner's Guide, 2nd Edition
Author: Kirupa Chinnathambi
ISBN: 9780136204213

by Kirupa Chinnathambi

December 2019

Beginner

464 pages

10h 31m

English

Que

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Cover Page
About This eBook
Title Page
Copyright Page
Contents at a Glance
Register Your Book
Table of Contents
Dedication
Acknowledgments
About the Author

Figure Credits
Introduction
Parlez-vous JavaScript?Contacting Me/Getting Help
1. Hello, World!
What Is JavaScript?Hello, World!Looking at the Code: Statements and Functions
Part I: The Basic Stuff
2. Values and Variables
Using VariablesMore Variable Stuff
3. Functions
What Is a Function?A Simple FunctionCreating a Function that Takes ArgumentsCreating a Function that Returns Data
4. Conditional Statements: if, Else, and Switch
The If / Else StatementSwitch StatementsDeciding Which to Use
5. Looping with for, While, and Do...While!
The for LoopSome for Loop ExamplesThe Other Loops
6. Commenting Your Code...FTW!
What Are Comments?Commenting Best Practices
7. Timers
Delaying with setTimeout
8. Variable Scope
Global ScopeLocal ScopeMiscellaneous Scoping Shenanigans
9. Closures
Functions within FunctionsWhen the Inner Functions Aren’t Self-Contained
10. Where Should Your Code Live?
Approach #1: All the Code Lives in Your HTML DocumentApproach #2: The Code Lives in a Separate FileSo...Which Approach to Use?
Part II: It’s an Object-Oriented World
11. Console Logging Basics
Meet the ConsoleDisplaying the ConsoleIf You Want to Follow AlongConsole Logging 101
12. Of Pizza, Types, Primitives, and Objects
Let’s First Talk About PizzaFrom Pizza to JavaScript!What Are Objects?The Predefined Objects Roaming Around in JavaScript
13. Arrays
Creating an ArrayAccessing Array ValuesAdding Items to Your ArrayRemoving Items from the ArrayFinding Items in the ArrayMerging ArraysMapping, Filtering, and Reducing ArraysThe Old School WayModifying Each Array Item with MapGetting One Value from an Array of ItemsA Short Foray into Functional Programming
14. Strings
The BasicsString Properties and Methods
15. When Primitives Behave Like Objects
Strings Aren’t the Only ProblemLet’s Pick on Strings AnywayWhy This Matters
16. Numbers
Using a NumberOperatorsIncrementing and DecrementingHexadecimal and Octal ValuesSpecial Values—Infinity and NaNThe Math ObjectRandom Numbers
17. Getters and Setters
A Tale of Two PropertiesMeet Getters and Setters
18. A Deeper Look at Objects
Meet the ObjectCreating Custom ObjectsThe this Keyword
19. Extending Built-In Objects
Say Hello to prototype...again—Sort of!Extending Built-in Objects is Controversial
20. Using Classes
The Class Syntax and Object CreationExtending Objects
21. Booleans and the Stricter === and !== Operators
The Boolean ObjectThe Boolean FunctionStrict Equality and Inequality Operators
22. Null and Undefined
NullUndefined
Part III: Working with the DOM
23. All About JSON (aka JavaScript Object Notation)
What Is JSON?Looking Inside a JSON ObjectReading JSON DataWriting JSON Data?
24. JS, the Browser, and the DOM
What HTML, CSS, and JavaScript DoHTML Defines the StructurePrettify My World, CSS!It’s JavaScript Time!Meet the Document Object Model
25. Finding Elements in the DOM
Meet the querySelector FamilyIt Really Is the CSS Selector Syntax
26. Modifying DOM Elements
DOM Elements Are Objects—Sort of!Let’s Actually Modify DOM Elements
27. Styling our Content
Why Would We Set Styles Using JavaScript?A Tale of Two Styling ApproachesChecking Whether a Class Value Exists
28. Traversing the DOM
Finding Your Way AroundPutting It All Together
29. Creating and Removing DOM Elements
Creating ElementsRemoving ElementsCloning Elements
30. In-Browser Developer Tools
Meet the Developer Tools
Part IV: Dealing with Events
31. Events
What Are Events?Events and JavaScriptA Simple ExampleThe Event Arguments and the Event Type
32. Event Bubbling and Capturing
Event Goes Down. Event Goes Up.Meet the PhasesWho Cares?Event, Interrupted
33. Mouse Events
Meet the Mouse EventsThe MouseEvent PropertiesDealing with the Mouse Wheel
34. Keyboard Events
Meet the Keyboard EventsUsing These EventsThe Keyboard Event PropertiesSome Examples
35. Page Load Events and Other Stuff
The Things That Happen During Page LoadThe DOMContentLoaded and load EventsScripts and Their Location in the DOMScript Elements—Async and Defer
36. Handling Events for Multiple Elements
How to Do All of This
37. Conclusion
Glossary
Index
Code Snippets

Content preview from JavaScript Absolute Beginner's Guide, 2nd Edition

Contents at a Glance

Introduction

1 Hello, World!

Part I The Basic Stuff

2 Values and Variables

3 Functions

4 Conditional Statements: If, Else, and Switch

5 Looping with For, While, and Do...While!

6 Commenting Your Code...FTW!

7 Timers

8 Variable Scope

9 Closures

10 Where Should Your Code Live?

Part II It’s an Object-Oriented World

11 Console Logging Basics

12 Of Pizza, Types, Primitives, and Objects

13 Arrays

14 Strings

15 When Primitives Behave Like Objects

16 Numbers

17 Getters and Setters

18 A Deeper Look at Objects

19 Extending Built-in Objects

20 Using Classes

21 Booleans and the Stricter === and !== Operators

22 Null and Undefined

Part III Working with the DOM

23 All About JSON (aka JavaScript Object Notation)

24 JS, the Browser, and ...

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JavaScript Absolute Beginner's Guide, 2nd Edition

by Kirupa Chinnathambi

Contents at a Glance

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.