Eloquent JavaScript

Brief Contents
Contents in Detail
Introduction
	On Programming
	Why Language Matters
	What Is JavaScript?
	Code, and What to Do with It
	Overview of This Book
	Typographic Conventions
Part I: Language
Chapter 1: Values, Types, and Operators
	Values
	Numbers
		Arithmetic
		Special Numbers
	Strings
	Unary Operators
	Boolean Values
		Comparison
		Logical Operators
	Empty Values
	Automatic Type Conversion
		Short-Circuiting of Logical Operators
	Summary
Chapter 2: Program Structure
	Expressions and Statements
	Bindings
	Binding Names
	The Environment
	Functions
	The console.log Function
	Return Values
	Control Flow
	Conditional Execution
	while and do Loops
	Indenting Code
	for Loops
	Breaking Out of a Loop
	Updating Binding Succinctly
	Dispatching on a Value with switch
	Capitalization
	Comments
	Summary
	Exercises
		Looping a Triangle
		FizzBuzz
		Chessboard
Chapter 3: Functions
	Defining a Function
	Bindings and Scope
		Nested Scope
	Functions as Value
	Declaration Notation
	Arrow Functions
	The Call Stack
	Optional Arguments
	Closure
	Recursion
	Growing Functions
	Functions and Side Effects
	Summary
	Exercises
		Minimum
		Recursion
		Bean Counting
Chapter 4: Data Structures: Objects and Arrays
	The Weresquirrel
	Data Sets
	Properties
	Methods
	Objects
	Mutability
	The Lycanthrope's Log
	Computing Correlation
	Array Loops
	The Final Analysis
	Further Arrayology
	Strings and Their Properties
	Rest Parameters
	The Math Object
	Destructuring
	JSON
	Summary
	Exercises
		The Sum of a Range
		Reversing an Array
		A List
		Deep Comparison
Chapter 5: Higher-Order Functions
	Abstraction
	Abstracting Repetition
	Higher-Order Functions
	Script Data Set
	Filtering Arrays
	Transforming with map
	Summarizing with reduce
	Composability
	Strings and Character Codes
	Recognizing Text
	Summary
	Exercises
		Flattening
		Your Own Loop
		Everything
		Dominant Writing Direction
Chapter 6: The Secret Life of Objects
	Encapsulation
	Methods
	Prototypes
	Classes
	Class Notation
	Overriding Derived Properties
	Maps
	Polymorphism
	Symbols
	The Iterator Interface
	Getters, Setters, and Statics
	Inheritance
	The instanceof Operator
	Summary
	Exercises
		A Vector Type
		Groups
		Iterable Groups
		Borrowing a Method
Chapter 7: Project: A Robot
	Meadowfield
	The Task
	Persistent Data
	Simulation
	The Mail Truck's Route
	Pathfinding
	Exercises
		Measuring a Robot
		Robot Efficiency
		Persistent Group
Chapter 8: Bugs and Errors
	Language
	Strict Mode
	Types
	Testing
	Debugging
	Error Propagation
	Exceptions
	Cleaning Up After Exceptions
	Selective Catching
	Assertions
	Summary
	Exercises
		Retry
		The Locked Box
Chapter 9: Regular Expressions
	Creating a Regular Expression
	Testing for Matches
	Sets of Characters
	Repeating Parts of a Pattern
	Grouping Subexpressions
	Matches and Groups
	The Date Class
	Word and String Boundaries
	Choice Patterns
	The Mechanics of Matching
	Backtracking
	The replace Method
	Greed
	Dynamically Creating RegExp Objects
	The search Method
	The lastIndex Property
		Looping Over Matches
	Parsing an INI File
	International Characters
	Summary
	Exercises
		Regexp Golf
		Quoting Style
		Numbers Again
Chapter 10: Modules
	Modules as Building Blocks
	Packages
	Improvised Modules
	Evaluating Data as Code
	CommonJS
	ECMAScript Modules
	Building and Bundling
	Module Design
	Summary
	Exercises
		A Modular Robot
		Roads Module
		Circular Dependencies
Chapter 11: Asynchronous Programming
	Asynchronicity
	Crow Tech
	Callbacks
	Promises
	Failure
	Networks Are Hard
	Collections of Promises
	Network Flooding
	Message Routing
	Async Functions
	Generators
	The Event Loop
	Asynchronous Bugs
	Summary
	Exercises
		Tracking the Scalpel
		Building Promise.all
Chapter 12: Project: A Programming Language
	Parsing
	The Evaluator
	Special Forms
	The Environment
	Functions
	Compilation
	Cheating
	Exercises
		Arrays
		Closure
		Comments
		Fixing Scope
Part II: Browser
Chapter 13: JavaScript and the Browser
	Networks and the Internet
	The Web
	HTML
	HTML and JavaScript
	In the Sandbox
	Compatibility and the Browser Wars
Chapter 14: The Document Object Model
	Document Structure
	Trees
	The Standard
	Moving Through the Tree
	Finding Elements
	Changing the Document
	Creating Nodes
	Attributes
	Layout
	Styling
	Cascading Styles
	Query Selectors
	Positioning and Animating
	Summary
	Exercises
		Build a Table
		Elements by Tag Name
		The Cat's Hat
Chapter 15: Handling Events
	Event Handlers
	Events and DOM Nodes
	Event Objects
	Propagation
	Default Actions
	Key Events
	Pointer Events
		Mouse Clicks
		Mouse Motion
		Touch Events
	Scroll Events
	Focus Events
	Load Event
	Events and the Event Loop
	Timers
	Debouncing
	Summary
	Exercises
		Balloon
		Mouse Trail
		Tabs
Chapter 16: Project: A Platform Game
	The Game
	The Technology
	Levels
	Reading a Level
	Actors
	Encapsulation as a Burden
	Drawing
	Motion and Collision
	Actor Updates
	Tracking Keys
	Running the Game
	Exercises
		Game Over
		Pausing the Game
		A Monster
Chapter 17: Drawing on Canvas
	SVG
	The Canvas Element
	Lines and Surfaces
	Paths
	Curves
	Drawing a Pie Chart
	Text
	Images
	Transformation
	Storing and Clearing Transformations
	Back to the Game
	Choosing a Graphics Interface
	Summary
	Exercises
		Shapes
		The Pie Chart
		A Bouncing Ball
		Precomputed Mirroring
Chapter 18: HTTP and Forms
	The Protocol
	Browsers and HTTP
	Fetch
	HTTP Sandboxing
	Appreciating HTTP
	Security and HTTPS
	Form Fields
	Focus
	Disabled Fields
	The Form as a Whole
	Text Fields
	Checkboxes and Radio Buttons
	Select Fields
	File Fields
	Storing Data Client-Side
	Summary
	Exercises
		Content Negotiation
		A JavaScript Workbench
		Conway's Game of Life
Chapter 19: Project: A Pixel Art Editor
	Components
	The State
	DOM Building
	The Canvas
	The Application
	Drawing Tools
	Saving and Loading
	Undo History
	Let's Draw
	Why Is This So Hard?
	Exercises
		Keyboard Bindings
		Efficient Drawing
		Circles
		Proper Lines
Part III: Node
Chapter 20: Node.js
	Background
	The node Command
	Modules
	Installing with NPM
		Package Files
		Versions
	The File System Module
	The HTTP Module
	Streams
	A File Server
	Summary
	Exercises
		Search Tool
		Directory Creation
		A Public Space on the Web
Chapter 21: Project: Skill-Sharing Website
	Design
	Long Polling
	HTTP Interface
	The Server
		Routing
		Serving Files
		Talks as Resources
		Long Polling Support
	The Client
		HTML
		Actions
		Rendering Components
		Polling
		The Application
	Exercises
		Disk Persistence
		Comment Field Resets
Chapter 22: JavaScript and Performance
	Staged Compilation
	Graph Layout
	Defining a Graph
	Force-Directed Layout
	Avoiding Work
	Profiling
	Function Inlining
	Creating Less Garbage
	Garbage Collection
	Dynamic Types
	Summary
	Exercises
		Pathfinding
		Timing
		Optimizing
Exercise Hints
	Chapter 2: Program Structure
		Looping a Triangle
		FizzBuzz
		Chessboard
	Chapter 3: Functions
		Minimum
		Recursion
		Bean Counting
	Chapter 4: Data Structures: Objects and Arrays
		The Sum of a Range
		Reversing an Array
		A List
		Deep Comparison
	Chapter 5: Higher-Order Functions
		Everything
		Dominant Writing Direction
	Chapter 6: The Secret Life of Objects
		A Vector Type
		Groups
		Iterable Groups
		Borrowing a Method
	Chapter 7: Project: A Robot
		Measuring a Robot
		Robot Efficiency
		Persistent Group
	Chapter 8: Bugs and Errors
		Retry
		The Locked Box
	Chapter 9: Regular Expressions
		Quoting Style
		Numbers Again
	Chapter 10: Modules
		A Modular Robot
		Roads Module
		Circular Dependencies
	Chapter 11: Asynchronous Programming
		Tracking the Scalpel
		Building Promise.all
	Chapter 12: Project: A Programming Language
		Arrays
		Closure
		Comments
		Fixing Scope
	Chapter 14: The Document Object Model
		Build a Table
		Elements by Tag Name
		The Cat's Hat
	Chapter 15: Handling Events
		Balloon
		Mouse Trail
		Tabs
	Chapter 16: Project: A Platform Game
		Pausing the Game
		A Monster
	Chapter 17: Drawing on Canvas
		Shapes
		The Pie Chart
		A Bouncing Ball
		Precomputed Mirroring
	Chapter 18: HTTP and Forms
		Content Negotiation
		A JavaScript Workbench
		Conway's Game of Life
	Chapter 19: Project: A Pixel Art Editor
		Keyboard Bindings
		Efficient Drawing
		Circles
		Proper Lines
	Chapter 20: Node.js
		Search Tool
		Directory Creation
		A Public Space on the Web
	Chapter 21: Project: Skill-Sharing Website
		Disk Persistence
		Comment Field Resets
	Chapter 22: JavaScript and Performance
		Pathfinding
		Optimizing
Index