https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

JavaScript - The Definitive Guide Index

3D graphic]]s]], Graphic]]s]] in a <canvas>

; (semicolon), Optional Semicolons-Optional Semicolons

< (less than]] operator)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

« (shift left operator), Bitwise Operators

⇐ (less than or equal to operator)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

= (assignment operator), A Tour of JavaScript, Equality and Inequality Operators, Assignment Expressions

== (equality operator)overview of, Equality and Inequality Operators

type conversions, Overview and Definitions, Conversions and Equality, Special case operator conversions

=== (strict equality operator)boolean values, Boolean Values

overview of, Equality and Inequality Operators

string comparison, Working with Strings

type conversions, Overview and Definitions, Conversions and Equality

⇒ (arrows), A Tour of JavaScript, Optional Semicolons, Arrow Functions

(greater]] than]] operator)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

= (greater]] than]] or equal to]] operator)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

(shift right with sign operator), Bitwise Operators

(shift right with zero fill operator), Bitwise Operators

?. (conditional access operator), A Tour of JavaScript, Function Invocation

?: (conditional operator), The Conditional Operator (?:)

?? (first-defined operator), First-Defined (??)

[] (square brackets), A Tour of JavaScript, Working with Strings, Object and Array Initializers, Querying and Setting Properties, Reading and Writing Array Elements, Strings as Arrays

\ (backslash]]), String Literals-Escape Sequences in String Literals

\n (new[[line), String Literals, Escape Sequences in String Literals

\u (Unicode character escape), Unicode Escape Sequences, Escape Sequences in String Literals

\xA9 (copy right symbol), Escape Sequences in String Literals

\` (back tick or apostrophe) escape, Escape Sequences in String Literals

_ (underscore), Identifiers and Reserved Words

_ (underscores, as numeric separators), Floating-Point Literals

` (back tick), String Literals, Template Literals

{} (curly braces), A Tour of JavaScript, Object and Array Initializers

]] | javascript_-_the_definitive_guide_index | ([[Boolean OR operator), Boolean Values, Logical OR (]] | javascript_-_the_definitive_guide_index | ) ~ ([[bitwise NOT operator), Bitwise Operators

ǀ (bitwise OR operator), Bitwise Operators

… (spread operator), Spread Operator, The Spread Operator, The Spread Operator for Function Calls, Iterators and Generators

A

abstract classes]], Class Hierarchies and Abstract Classes]]-Summary

accelerometers, Mobile Device]] APIs

accessor]] properties, Property Getters and Setters]]

add Event Listener]]() method, add Event Listener]]()

additive operator (+), Arithmetic in JavaScript, The + Operator

advanced]] featuresobject extensibility, Object Extensibility

overview of, Meta programming

property attributes, Property Attributes-Property Attributes

prototype attribute, The prototype Attribute

Proxy objects, Proxy Objects-Proxy In[[variants

Reflect API, The Reflect API-The Reflect API

template tags, Template Tags-Template Tags

well-known Symbolspattern-matching symbols, Pattern-Matching Symbols

Symbol.a[[sync Iterator, Symbol.iterator and Symbol.a[[sync Iterator

Symbol.hasInstance, Symbol.hasInstance

Symbol.isConcat Spreadable]], Symbol.isConcat Spreadable]]

Symbol.iterator, Well-Known Symbols

Symbol.species, Symbol.species-Symbol.species

Symbol.toPrimitive, Symbol.toPrimitive

Symbol.toString Tag, Symbol.toString Tag

Symbol.unscopables, Symbol.unscopables

alphabetization, Comparing Strings

anchor characters, Specifying match position

apostrophes, String Literals

apply() method, Indirect Invocation, The call() and apply() Methods

arc() method, Curves

arcTo() method, Curves

argumentsargument types, Argument Types

Arguments object, The Arguments Object

definition of term, Functions

destructuring function arguments into parameters, Destructuring Function Arguments into Parameters-Destructuring Function Arguments into Parameters

variable-length argument lists, Rest Parameters and Variable-Length Argument Lists

arithmetic operators, A Tour of JavaScript, Arithmetic in JavaScript-Arithmetic in JavaScript, Arithmetic Expressions-Bitwise Operators

array index, Reading and Writing Array Elements

array iterator methodsevery() and some(), every() and some()

filter(), filter()

find() and find Index(), find() and find Index()

forEach(), forEach()

map(), map()

overview of, Array Iterator Methods

reduce() and reduce Right(), reduce() and reduce Right()

array literals, Object and Array Initializers, Array Literals

Array() constructor, The Array() Constructor

Array.from() function, Array.from(), Static Array Functions

Array.isArray() function, Static Array Functions

Array.of() function, Array.of(), Static Array Functions

Array.prototype, Arrays, Array-Like Objects

Array.sort() method, Functions as Values]]

array Buffer() method, Parsing response bodies

arraysadding and deleting, Adding and Deleting Array Elements

array length, Array Length

array methodsadding arrays, Adding arrays with concat()

array to string conversions, Array to String Conversions

flattening arrays, Flattening arrays with flat() and flatMap()

generic application of, Arrays

iterator methods, Array Iterator Methods-reduce() and reduce Right()

overview of, Array Methods

searching and sorting, Array Searching and Sorting Methods-re[[verse()

stacks and queues, Stacks and Queues with push(), pop(), shift(), and unshift()

static array functions, Static Array Functions

sub arrays, Sub arrays with slice(), splice(), fill(), and copyWithin]]()

array-like objects, Array-Like Objects-Array-Like Objects

associative arrays, Introduction to Objects, Objects As Associative Arrays

creating, Creating Arrays-Array.from()

definition of term, Overview and Definitions

initializer expressions, A Tour of JavaScript, Object and Array Initializers

iterating arrays, Iterating Arrays

multi dimensional arrays, Multi dimensional Arrays

nested]], Object and Array Initializers

overview of, A Tour of JavaScript, Arrays

processing with functions, Processing Arrays with Functions

reading and writing array elements, Reading and Writing Array Elements

sparse arrays, Sparse Arrays

strings as arrays, Strings as Arrays

typed arrayscreating, Creating Typed Arrays

Data View and endianness, Data View and Endianness

methods and properties, Typed Array Methods and Properties

overview of, Typed Arrays and Binary Data

typed array types, Typed Array Types

using, Using Typed Arrays

arrow functions, A Tour of JavaScript, Defining Functions, Arrow Functions

arrows (⇒), A Tour of JavaScript, Optional Semicolons, Arrow Functions

ASCII control characters, The Text of a JavaScript Program

assertion]]s, A Tour of JavaScript

assignment operator (, A Tour of JavaScript, Equality and Inequality Operators, Assignment Expressions

associative arrays, Introduction to Objects, Objects As Associative Arrays

associativity, Operator Associativity

a[[sync keyword, a[[sync and await-Implementation]] Details

a[[synchronous]] programming (see also Node)a[[sync and await keywords, a[[sync and await-Implementation]] Details

a[[synchronous]] iteration a[[synchronous]] generators, A[[synchronous]] Generators

a[[synchronous]] iterators, A[[synchronous]] Iterators

for/await loops, A[[synchronous]] iteration with for/await, A[[synchronous]] Iteration

implementation]], Implementing]] A[[synchronous]] Iterators-Implementing]] A[[synchronous]] Iterators

call[[backscall[[backs and events in Node, Call[[backs and Events in Node

definition of term, A[[synchronous]] Programming with Call[[backs

events, Events

net work events, Net work Events

timer]]s, Timer]]s

definition of term, A[[synchronous]] JavaScript

JavaScript support for, A[[synchronous]] JavaScript

Promiseschaining]] Promises, Chaining]] Promises-Chaining]] Promises

error handling with, Handling errors with Promises, More on Promises and Errors-The catch and finally methods

making Promises, Making Promises-Promises in Sequence

overview of, Promises

parallel operations, Promises in Parallel

Promises in sequence, Promises in Sequence-Promises in Sequence

re[[solving Promises, Re[[solving Promises-More on Promises and Errors

returning]] from Promise call[[backs, The catch and finally methods

terminology, Handling errors with Promises

using, Using Promises-Handling errors with Promises

audio APIsAudio() constructor, The Audio() Constructor

overview of, Audio APIs

Web Audio API, The Web Audio API

await keyword, a[[sync and await-Implementation]] Details

await operator, The await Operator

B

Babel, Transpilation with Babel

backend]] JavaScript, JavaScript in Web Browsers

back pressure, Writing to Streams]] and Handling Back pressure-Writing to Streams]] and Handling Back pressure

backslash]] (\), String Literals-Escape Sequences in String Literals

back tick (`), String Literals, Template Literals

bare catch clauses, try/catch/finally

bezierCurveTo() method, Curves

big-endian]] byte ordering]], Data View and Endianness

BigInt type, Arbitrary Precision Integers with BigInt

binary data, processing, Typed Arrays and Binary Data-Data View and Endianness, Binary APIs (see also typed arrays)

binary integer literals, Integer Literals

binary operators, Number of Operands

bind() method, The bind() Method, Partial Application of Functions

bitwise operators, Bitwise Operators

blob() method, Parsing response bodies

b[[lock scoping, Variable and constant scope

b[[locking]] script execution, When scripts run: a[[sync and deferred

Boolean AND operator (&&), Boolean Values, Logical AND (&&)

Boolean NOT operator (!), Logical NOT (!)

Boolean OR operator (]] | javascript_-_the_definitive_guide_index | ), [[Boolean Values, Logical OR (]] | javascript_-_the_definitive_guide_index | ) [[boolean values, Boolean Values-Boolean Values

Boolean() function, Explicit Conversions

break statements, break

browser development]] tools, Exploring JavaScript

browsing hi[[story managing with hash change events, Hi[[story Management]] with hash change Events

managing with push State(), Hi[[story Management]] with push State()

overview of, Browsing Hi[[story

structured]] clone algorithm, Hi[[story Management]] with push State()

Buffer class (Node), Buffers

C

Cache API, Progressive]] Web Apps and Service Workers

calendars, Formatting]] Dates and Times

call() method, Indirect Invocation, The call() and apply() Methods

call[[backscall[[backs and events in Node, Call[[backs and Events in Node

definition of term, A[[synchronous]] Programming with Call[[backs

events, Events

net work events, Net work Events

timer]]s, Timer]]s

Canvas API, Graphic]]s]] in a <canvas>-Pixel Manipulation canvas dimensions and co[[ordinates, Canvas Dimensions and Co[[ordinates

co[[ordinate system trans[[forms, Co[[ordinate System Trans[[forms-Trans[[formation]] example

draw Image() function, Media APIs

drawing operationscurves, Curves

images, Images

rectangles, Rectangles

text, Text

graphic]]s]] attributescolors, patterns, and gradients, Colors, patterns, and gradients

line styles, Line styles

overview of, Graphic]]s]] Attributes

saving and re[[storing graphic]]s]] state, Saving and re[[storing graphic]]s]] state

shadows, Shadows

text styles, Text styles

translucency and compositing, Translucency and compositing

overview of, Graphic]]s]] in a <canvas>

paths and polygons, Paths and Polygons

pixel manipulation, Pixel Manipulation

case sensitivity, The Text of a JavaScript Program

catch clauses, try/catch/finally-Miscellaneous Statements

catch statements, Error Classes

.catch() method, The catch and finally methods-The catch and finally methods

character classes (regular expressions), Character classes

character frequency histograms, Example: Character Frequency Histograms-Summary

charAt() method, Strings as Arrays

check scope() function, Closures

child processes (Node), Working with Child Processes-fork()benefits of, Working with Child Processes

exec() and exec File(), exec() and exec File()

exec Sync() and exec File Sync(), exec Sync() and exec File Sync()

fork(), fork()

options, exec Sync() and exec File Sync()

spawn(), spawn()

class declaration, class

class keyword, Classes with the class Keyword-Example: A Complex Number Class

class methods, Static Methods

classesadding methods to existing classes, Adding Methods to Existing Classes

classes and constructors, Classes and Constructors-The constructor Property constructor property, The constructor Property

constructors, class id[[entity, and instanceof, Constructors, Class Id[[entity, and instanceof

new.target expression, Classes and Constructors

classes and prototypes, Classes and Prototypes

classes with class keyword, Classes with the class Keyword-Example: A Complex Number Class complex number class example, Example: A Complex Number Class-Example: A Complex Number Class

getters, setters, and other method forms, Getters, Setters, and other Method Forms

public private, and static fields, Public, Private, and Static Fields-Public, Private, and Static Fields

static methods, Static Methods

modular programming with, Modules with Classes, Objects, and Closures

naming, Reserved Words

overview of, Overview and Definitions, Classes

subclasses]]class hierarchies and abstract classes]], Class Hierarchies and Abstract Classes]]-Summary

delegation versus inheritance, Delegation Instead of Inheritance

overview of, Subclasses]]

subclasses]] and prototypes, Subclasses]] and Prototypes

with extends clause, Subclasses]] with extends and super-Subclasses]] with extends and super

client-side JavaScript, JavaScript in Web Browsers

client-side storage, Storage

clip ping, Clip ping

close st() method, Selecting]] elements with CSS selector]]s

closurescombining with property getters and setters]], Closures

common errors, Closures

definition of term, Closures

lexical scoping rules and, Closures

modular programming with, Automating Closure-Based Modularity

nested]] function closures, Closures

shared]] private state, Closures

code bundling, Code Bundling

code examplescomment syntax in, A Tour of JavaScript

obtaining and using, Example Code

trying out JavaScript code, Exploring JavaScript

collation order, Comparing Strings

colors, Colors, patterns, and gradients

comma operator (,), The comma Operator (,)

commentssyntax for, A Tour of JavaScript, Comments

syntax in code examples, A Tour of JavaScript

compare() method, Comparing Strings

comparison operators, Comparison Operators

compositing, Translucency and compositing

compound [[statements, Compound and Empty Statements

computed properties, Computed Property Names

concat() method, Adding arrays with concat()

conditional access operator (?.), A Tour of JavaScript, Function Invocation

conditional invocation, Conditional Invocation, Function Invocation

conditional operator (?:), The Conditional Operator (?:)

conditional statements, Statements, Conditionals-switch

configurable]] attribute, Introduction to Objects, Property Attributes

Console API console.[[log() function, The Console API

formatted]] output with, Formatted]] Output with Console

functions defined by, The Console API-The Console API

support for, The Console API

console.[[log() function, Hello World, Console Output

const keyword, Declarations with let and const

constantsdeclaring, Overview and Definitions, Declarations with let and const, const, let, and var

definition of term, Variable Declaration and Assignment

naming, Reserved Words

constructorsArray() constructor, The Array() Constructor

Audio() constructor, The Audio() Constructor

classes and, Classes and Constructors-The constructor Property constructor property, The constructor Property-The constructor Property

constructors, class id[[entity, and instanceof, Constructors, Class Id[[entity, and instanceof

new.target expression, Classes and Constructors

constructor invocation, Constructor Invocation

definition of term, Functions

examples of, Creating Objects]] with new

Function() constructor, The Function() Constructor

Set() constructor, The Set Class

Content-Security-Policy HTTP header]], Security

continue statements, continue

control structures, A Tour of JavaScript-A Tour of JavaScript, Statements

cookie]]sAPI for manipulating, Cookie]]s

definition of term, Cookie]]s

life time and scope attributes, Cookie]] attributes: life time and scope

l[[imitations of, Cookie]] attributes: life time and scope

origin of name, Cookie]]s

reading, Reading cookie]]s

storing, Storing cookie]]s

co[[ordinate system trans[[forms, Co[[ordinate System Trans[[forms-Trans[[formation]] example

copy right symbol (\xA9), Escape Sequences in String Literals

copyWithin]]() method, copyWithin]]()

Credential Management]] API, Crypto]]graphy]] and Related APIs

Cross-Origin Re[[source Sharing (CORS), The same-origin policy, Cross-origin requests

cross-site scripting (XSS), Cross-site scripting

crypto]]graphy]], Arbitrary Precision Integers with BigInt, Crypto]]graphy]] and Related APIs

CSS pixels, Document Co[[ordinates and View port Co[[ordinates

CSS style]]sheetscommon CSS style]]s, Scripting CSS

computed styles, Computed Styles

CSS animations and events, CSS Animations and Events

CSS classes, CSS Classes

CSS selector]] syntax, Selecting]] elements with CSS selector]]s

inline styles, In[[line Styles

naming conventions, In[[line Styles

scripting style sheets, Scripting Style sheets

CSS Style Declaration object, In[[line Styles

curly braces ({}), A Tour of JavaScript, Object and Array Initializers

currency, Formatting]] Numbers

curves, Curves

D

data properties, Property Getters and Setters]]

Data View class, Data View and Endianness

Date type, Overview and Definitions, Dates and Times

dates and times date arithmetic, Date Arithmetic

formatting]] and parsing date strings, Formatting]] and Parsing Date Strings

formatting]] for internationalization]], Formatting]] Dates and Times-Formatting]] Dates and Times

high-re[[solution time stamps, Time stamps

overview of, Dates and Times, Dates and Times

time stamps, Time stamps

debugger statements, debugger

declarationsclass, class

const, let, and var, const, let, and var

function, function

import and export, import and export

overview of, Declarations

de[[code URI() function, Legacy URL Functions

de[[code URI Component() function, Legacy URL Functions

decrement operator (–), Unary Arithmetic Operators

delegation, Delegation Instead of Inheritance

delete operator, The delete Operator, Deleting Properties

denial-of-[[service attacks, Writing to Streams]] and Handling Back pressure

destructuring assignment]], Destructuring Assignment-Destructuring Assignment, Destructuring Function Arguments into Parameters-Destructuring Function Arguments into Parameters

development]] tools, Exploring JavaScript

device motion event, Mobile Device]] APIs

device orientation event, Mobile Device]] APIs

device Pixel Ratio property, Document Co[[ordinates and View port Co[[ordinates

dictionaries, Introduction to Objects, Objects As Associative Arrays

directories]] (Node), Working with Directories]]

distance() function, Function Declarations

di[[vision operator (/), Arithmetic in JavaScript, Arithmetic Expressions

do/while loops, do/[[while

document geometry and sc[[rolling, Document Geometry and Sc[[rolling-View port Size, Content Size, and Sc[[roll Position CSS pixels, Document Co[[ordinates and View port Co[[ordinates

determining element at a point, Determining the Element at a Point

document co[[ordinates and view port co[[ordinates, Document Co[[ordinates and View port Co[[ordinates

querying geometry of elements, Querying the Geometry of an Element

sc[[rolling, Sc[[rolling

view port size, content size, and sc[[roll position, View port Size, Content Size, and Sc[[roll Position

Document Object Model (DOM), The Document Object Model-Example: Generating a Table of Contents]]document structure and traversal, Document Structure and Traversal

Document Fragment nodes, Using Web Components

dynamically]] generating tables of contents]], Example: Generating a Table of Contents]]

iframe elements, Document Co[[ordinates and View port Co[[ordinates

modifying]] content, Element content as HTML

modifying]] structure, Creating, Inserting]], and Deleting Nodes

overview of, Scripting Documents

querying and setting attributes, Attributes

selecting]] document elements, Selecting]] Document Elements

shadow DOM, Shadow DOM-Shadow DOM API

Document Fragment nodes, Using Web Components

documents, loading]] new, Loading]] New Documents

dollar sign ($), Identifiers and Reserved Words

DOM Content Loaded event, Execution of JavaScript Programs, Client-side JavaScript time line

dot operator (.), A Tour of JavaScript, Querying and Setting Properties

double quotes (”), String Literals

double slashes (//), A Tour of JavaScript, A Tour of JavaScript, Comments

draw Image() function, Media APIs

drawing operationscurves, Curves

images, Images

rectangles, Rectangles

text, Text

dynamic arrays, Arrays

E

ECMA402 standard, The Internationalization]] API

ECMA Script (ES), Introduction to JavaScript

elementFromPoint() method, Document Co[[ordinates and View port Co[[ordinates

elementsarray elementsdefinition of term, Arrays

reading and writing, Reading and Writing Array Elements

document elementscustom elements, Custom Elements

determining element at a point, Determining the Element at a Point

iframe, Document Co[[ordinates and View port Co[[ordinates

querying geometry of elements, Querying the Geometry of an Element

selecting]], Selecting]] Document Elements

ellipse() method, Curves

else if statements, else if

emojis, Unicode, Escape Sequences in String Literals

empty statements, Compound and Empty Statements

empty strings, Text

en[[code URI() function, Legacy URL Functions

en[[code URI Component() function, Legacy URL Functions

English contractions, String Literals

enumerable]] attribute, Introduction to Objects, Property Attributes

equality operator (=overview of, Equality and Inequality Operators

type conversions, Overview and Definitions, Conversions and Equality, Special case operator conversions

equality operators, A Tour of JavaScript

Error classes, Error Classes

error handling using Promises, Handling errors with Promises, More on Promises and Errors

web browser host environment, Program Errors

ES 2016 exponentiation operator (**), Arithmetic in JavaScript, Arithmetic Expressions

includes() method, includes()

ES 2017, a[[sync and await keywords, The await Operator, A[[synchronous]] JavaScript, a[[sync and await-Implementation]] Details

ES 2018 a[[synchronous]] iterator, A[[synchronous]] iteration with for/await, A[[synchronous]] Iteration

destructuring with rest parameters, Destructuring Function Arguments into Parameters

.finally() method, The catch and finally methods

regular expressionslookbehind assertion]]s, Specifying match position

named]] capture groups, Alter nation, grouping]], and references

s flag, Flags

Unicode character classes, Character classes

spread operator (…), Spread Operator, Destructuring Function Arguments into Parameters, Iterators and Generators

ES 2019 bare catch clauses, try/catch/finally

flattening arrays, Flattening arrays with flat() and flatMap()

ES 2020?? operator, First-Defined (??)

BigInt type, Arbitrary Precision Integers with BigInt

BigInt64Array(), Typed Array Types

BigUint64Array(), Typed Array Types

conditional access operator (?.), A Tour of JavaScript, Property Access Errors, Function Invocation

conditional invocation, Conditional Invocation

globalThis]], The Global Object

import() function, Dynamic Imports with import()

last Index and RegExp API, exec()

matchAll() method, matchAll(), exec(), Implementing]] Iterable Objects

operator precedence, Operator Precedence

Promise.allSettled(), Promises in Parallel

property access expressions, Conditional Property Access

ES5 apply() method, The call() and apply() Methods

breaking]] strings across multiple lines, String Literals, Escape Sequences in String Literals

bugs addressed by b[[lock-scoped]] variables, Closures

compatibility base line, Introduction to JavaScript

Function.bind() method, The constructor Property

getters and setters]], Property Getters and Setters]]

IE11 workaround, JavaScript Modules on the Web

transpilation with Babel, Transpilation with Babel

ES6 Array.of() function, Array.of()

arrow functions, Defining Functions, Arrow Functions

binary and octal integers, Integer Literals

built-in tag function, Tagged template literals

class declaration, class

class keyword, Classes with the class Keyword-Example: A Complex Number Class

computed properties, Computed Property Names

extended object literal syntax, Shorthand Properties

for/of loops, for/of-for/in

IE11 workaround, JavaScript Modules on the Web

iterable strings in, Text

iterating arrays, Iterating Arrays

Math object, Arithmetic in JavaScript

modules indynamic imports with import(), Dynamic Imports with import()

exports, ES6 Exports

import.meta.url, import.meta.url

imports, ES6 Imports-ES6 Imports

imports and exports with re[[naming, Imports and Exports with Re[[naming

JavaScript modules on the web, JavaScript Modules on the Web-JavaScript Modules on the Web

overview of, Modules in ES6

re-exports, Re-Exports

Promiseschaining]] Promises, Chaining]] Promises-Chaining]] Promises

error handling with, More on Promises and Errors-The catch and finally methods

making Promises, Making Promises-Promises in Sequence

overview of, Promises

parallel operations, Promises in Parallel

Promises in sequence, Promises in Sequence-Promises in Sequence

re[[solving Promises, Re[[solving Promises-More on Promises and Errors

returning]] from Promise call[[backs, The catch and finally methods

using, Using Promises-Handling errors with Promises

property enumeration order, Property Enumeration Order

re[[lease of, Introduction to JavaScript

Set and Map classes, for/of with Set and Map

shorthand methods, Shorthand Methods

spread operator (…), The Spread Operator

strings de[[limited]] with back ticks, String Literals, Template Literals

subclasses]] with extends clause, Subclasses]] with extends and super-Subclasses]] with extends and super

Symbol type, Overview and Definitions

symbols as property names, Symbols as Property Names

typed arrays, Arrays

variable declaration in, Variable Declaration and Assignment

yield

keyword, yield* and Recursive Generators

escape sequencesapostrophes, String Literals

in string literals, Escape Sequences in String Literals

Unicode, Unicode Escape Sequences

escape() function, Legacy URL Functions

ES Lint, Linting with ES Lint

eval() function, Evaluation Expressions-Strict eval()global eval(), Global eval()

strict eval(), Strict eval()

evaluation expressions, Evaluation Expressions-Strict eval()

event listener]]s, Events, Events

event-driven]] programming model, A[[synchronous]] JavaScript, Events-Dis[[patching]] Custom Events, Server-Sent Eventsdefinition of term, A[[synchronous]] JavaScript

dis[[patching]] custom events, Dis[[patching]] Custom Events

event cancellation, Event Cancellation

event categories, Event Categories

event handler invocation, Event Handler Invocation

event propagation, Event Propagation

overview of, Events

registering]] event handlers, Registering]] Event Handlers

server-sent events, Server-Sent Events

web plat[[form features to investigate, Events

Event Emitter class, Events and Event Emitter

every() method, every() and some()

exception]]s, throwing]] and catching]], throw

exec() method, exec()

exponential]] notation, Floating-Point Literals

exponentiation operator (**), Arithmetic in JavaScript, Arithmetic Expressions

export declaration, import and export

export keyword, Modules in ES6

expression statements, Expression Statements

expressionsarithmetic expressions, Arithmetic Expressions-Bitwise Operators

assignment expressions, Assignment Expressions-Assignment with Operation

definition of term, Expressions and Operators

embedding]] within string literals, String Literals

evaluation expressions, Evaluation Expressions-Strict eval()

forming with operators, A Tour of JavaScript, Expressions and Operators

function definition expressions, Function Definition Expressions

function expressions, Function Expressions, Functions as Namespaces

initializer expression, A Tour of JavaScript, Object and Array Initializers

invocation expressions, Invocation Expressions-Conditional Invocation, Function Invocation-Constructor Invocation

logical expressions, Logical Expressions-Logical NOT (!)

new.target expression, Classes and Constructors

object and array initializers, Object and Array Initializers

object creation expressions, Object Creation Expressions

primary expressions, Primary Expressions

property access expressions, Property Access Expressions-Conditional Property Access

relational expressions, Relational Expressions-The instanceof Operator

versus statements, A Tour of JavaScript, Statements

extensibility, Object Extensibility

F

factorial]]() function, Function Declarations, Function Invocation

factory functions, Classes and Prototypes

falsy values, Boolean Values

f[[etch]]() function, Net work Events

f[[etch]]() method aborting requests, Aborting a request

cross-origin requests, Cross-origin requests

examples of, f[[etch]]()

file up[[load, File up[[load with f[[etch]]()

HTTP status codes, response header]]s, and net work errors, HTTP status codes, response header]]s, and net work errors

miscellaneous request options, Miscellaneous request options

parsing response bodies, Parsing response bodies

setting request header]]s, Setting request header]]s

setting request parameters, Setting request parameters

specifying request method and request body, Specifying the request method and request body

steps of, f[[etch]]()

streaming response bodies, Streaming response bodies

fields, public, private, and static, Public, Private, and Static Fields

file handling (Node), Working with Files-Working with Directories]]directories]], Working with Directories]]

file meta data, File Meta data

file mode strings, Writing Files

file operations, File Operations

overview of, Working with Files

paths, file de[[scriptor]]s, and File Handles, Paths, File De[[scriptor]]s, and File Handles

reading files, Reading Files

writing files, Writing Files

fill() method, fill()

filter() method, filter()

.finally() method, The catch and finally methods-The catch and finally methods

financial ac[[count numbers, Storage

find() method, find() and find Index()

find Index() method, find() and find Index()

Fire fox Developer Tools, Exploring JavaScript

first-defined operator (??), First-Defined (??)

flat() method, Flattening arrays with flat() and flatMap()

flatMap() method, Flattening arrays with flat() and flatMap()

floating-point literals, Floating-Point Literals, Binary Floating-Point and Rounding Errors

Flow language extension, Type Checking with Flow-Enumerated Types and Discriminated Unionsarray types, Array Types

class types, Class Types

enumerated types and discriminated unions, Enumerated Types and Discriminated Unions

function types, Function Types

installing]] and running, Installing]] and Running Flow

object types, Object Types

other parameterize]]d types, Other Parameterize]]d Types

overview of, Type Checking with Flow

read-only]] types, Read-Only]] Types

type aliases, Type Aliases

Type Script versus Flow, Type Checking with Flow

union types, Union Types

using type annotations, Using Type Annotations

for [[loops, for, Iterating Arrays

for/await loops, A[[synchronous]] iteration with for/await, A[[synchronous]] Iteration

for/in loops, for/in, Enumerating Properties

for/of loops, Text, for/of-for/in, Iterating Arrays, Iterators and Generators

forEach() method, Iterating Arrays, forEach()

format() method, Formatting]] Numbers

fr[[actions, Formatting]] Numbers

fromData() method, Parsing response bodies

front-end JavaScript, JavaScript in Web Browsers

fs module (Node), Working with Files-Working with Directories]]

function declaration, function

function expressions, Function Expressions, Functions as Namespaces

function keyword, Defining Functions

Function() constructor, The Function() Constructor

function

keyword, Generators

functionsarrow functions, A Tour of JavaScript, Defining Functions, Arrow Functions

case sensitivity, The Text of a JavaScript Program

closures, Closures-Closures

defining, Defining Functions-Nested]] Functions

defining your own function properties, Defining Your Own Function Properties

factory functions, Classes and Prototypes

function arguments and parametersargument types, Argument Types

arguments object, The Arguments Object

destructuring function arguments into parameters, Destructuring Function Arguments into Parameters-Destructuring Function Arguments into Parameters

optional parameters and de[[faults, Optional Parameters and De[[faults

overview of, Function Arguments and Parameters

rest parameters, Rest Parameters and Variable-Length Argument Lists

spread operator for function calls, The Spread Operator for Function Calls

variable-length argument lists, Rest Parameters and Variable-Length Argument Lists

function definition expressions, Function Definition Expressions

function invocation, Creating Objects]] with new

function properties, methods, and constructor, Function Properties, Methods, and Constructor-The Function() Constructor bind() method, The bind() Method

call() and apply() methods, The call() and apply() Methods

Function() constructor, The Function() Constructor

length property, The length Property

name property, The name Property

prototype property, The prototype Property

toString() method, The toString() Method

functional programming exploring, Functional Programming

higher-[[order functions, Higher-Order Functions

memoization, Memoization

partial application of functions, Partial Application of Functions

processing arrays with function, Processing Arrays with Functions

functions as namespaces, Functions as Namespaces

functions as values]], Functions as Values]]-Defining Your Own Function Properties

invoking approaches to, Invoking Functions

constructor invocation, Constructor Invocation

examples, A Tour of JavaScript

implicit function invocation, Implicit Function Invocation

indirect invocation, Indirect Invocation

invocation expressions, Function Invocation

method invocation, Method Invocation-Method Invocation

naming, Reserved Words

overview of, Overview and Definitions, Functions

recursive functions, Function Invocation

shorthand syntax for, A Tour of JavaScript

static array functions, Static Array Functions

G

garbage [[collection, Overview and Definitions

generator functions, Generators, The Return Value of a Generator Function (see also iterators and generators)

Geolocation API, Mobile Device]] APIs

get Bounding]]ClientRect() method, Document Co[[ordinates and View port Co[[ordinates

get Random Values() method, Crypto]]graphy]] and Related APIs

getter methods, Property Getters and Setters]], Getters, Setters, and other Method Forms

global eval(), Global eval()

global object, The Global Object, The Global Object in Web Browsers

global variables, Variable and constant scope

gradients, Colors, patterns, and gradients

graphic]]s]]3D, Graphic]]s]] in a <canvas>

Canvas API, Graphic]]s]] in a <canvas>-Pixel Manipulation canvas dimensions and co[[ordinates, Canvas Dimensions and Co[[ordinates

clip ping, Clip ping

co[[ordinate system trans[[forms, Co[[ordinate System Trans[[forms-Trans[[formation]] example

drawing operations, Canvas Drawing Operations

graphic]]s]] attributes, Graphic]]s]] Attributes

overview of, Graphic]]s]] in a <canvas>

paths and polygons, Paths and Polygons

pixel manipulation, Pixel Manipulation

saving and re[[storing graphic]]s]] state, Saving and re[[storing graphic]]s]] state

scalable]] vector graphic]]s]] (SVG), SVG: Scalable]] Vector Graphic]]s]]-Creating SVG Images with JavaScript

greater]] than]] operator (>)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

greater]] than]] or equal to]] operator (>overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

H

hash change events, Hi[[story Management]] with hash change Events

hash tables, Introduction to Objects, Objects As Associative Arrays

hasOwnProperty operator, Testing Properties

Hello World, Hello World, Console Output

hexadecimal]] literals, Integer Literals, Escape Sequences in String Literals

higher-[[order functions, Higher-Order Functions

histograms, character frequency, Example: Character Frequency Histograms-Summary

hi[[story.push State() method, Hi[[story Management]] with push State()

hi[[story.replace State() method, Hi[[story Management]] with push State()

hoisting]], Variable Declarations with var

HTML <[[script> tags, JavaScript in HTML <script> Tags-Loading]] scripts on [[demand import and export directive]]s, Modules

loading]] scripts on [[demand, Loading]] scripts on [[demand

specifying script type, Specifying script type

syn chronous]] script execution, When scripts run: a[[sync and deferred

text property, Element content as plain-text

HTML <template> tag, HTML Templates

HTML code, single and double quotes in, String Literals

HTTP clients and servers, HTTP Clients and Servers-HTTP Clients and Servers

I

identifierscase sensitivity, The Text of a JavaScript Program

purpose of, Identifiers and Reserved Words, Variable Declaration and Assignment

reserved words, Identifiers and Reserved Words, Primary Expressions

syntax for, Identifiers and Reserved Words

ideographs, Unicode

if statements, if-if

if/else statement, Boolean Values

imagesdrawing in Canvas, Images

pixel manipulation, Pixel Manipulation

immediately invoked]] function expression, Functions as Namespaces

im[[mutability, Working with Strings, Immutable Primitive Values and Mutable Object References

implicit function invocation, Implicit Function Invocation

import declaration, import and export

import keyword, Modules in ES6

import() function, Dynamic Imports with import()

import.meta.url, import.meta.url

in operator, The in Operator, Testing Properties

includes() method, includes()

increment operator (++), Unary Arithmetic Operators

index position, Arrays, Reading and Writing Array Elements

Indexed]]DB, Indexed]]DB-Worker Threads and Messaging

indexOf]]() method, indexOf]]() and last IndexOf]]()

indirect invocation, Indirect Invocation

inequality operator (!=boolean values, Boolean Values

overview of, Equality and Inequality Operators

string comparison, Working with Strings

infinity value, Arithmetic in JavaScript

inheritance, Introduction to Objects, Inheritance, Delegation Instead of Inheritance

initializer expression, A Tour of JavaScript, Object and Array Initializers

instance methods, Static Methods

instanceof operator, The instanceof Operator, Constructors, Class Id[[entity, and instanceof

integer literals, Integer Literals

internationalization]] API classes included in, The Internationalization]] API

comparing strings, Comparing Strings-Comparing Strings

formatting]] dates and times, Formatting]] Dates and Times-Formatting]] Dates and Times

formatting]] numbers, Formatting]] Numbers-Formatting]] Numbers

support for in Node, The Internationalization]] API

translated]] text, The Internationalization]] API

interpolation, String Literals

Intl.Date Time Format class, Formatting]] Dates and Times-Formatting]] Dates and Times

Intl.Number Format class, Formatting]] Numbers-Formatting]] Numbers

invocation expressionsconditional invocation, Conditional Invocation, Function Invocation

method invocation, Invocation Expressions, Method Invocation

overview of, Function Invocation

isFinite() function, Arithmetic in JavaScript

isNaN() function, Arithmetic in JavaScript

iterators and generators (see also array iterator methods)advanced]] generator featuresreturn value of generator functions, The Return Value of a Generator Function

return() and throw() methods, The return() and throw() Methods of a Generator

value of yield expressions, The Value of a yield Expression

a[[synchronous]], A[[synchronous]] Iterators-Implementing]] A[[synchronous]] Iterators

closing iterators, “Closing” an Iterator: The Return Method

generatorsbenefits of, A Final Note About Generators

creating, Generators

definition of term, Generators

examples of, Generator Examples

yield

and recursive generators, yield* and Recursive Generators

how iterators work, How Iterators Work

implementing]] iterable objects, Implementing]] Iterable Objects-Implementing]] Iterable Objects

overview of, Iterators and Generators

J

JavaScript benefits of, Introduction to JavaScript, Summary

introduction tochapter overviews, A Tour of JavaScript, A Tour of JavaScript

character frequency histograms, Example: Character Frequency Histograms-Summary

Hello World, Hello World

hi[[story of, JavaScript in Web Browsers

JavaScript interpreters, Exploring JavaScript

lexical structure, Lexical Structure-Summary

names, versions, and modes, Introduction to JavaScript

syntax and capabilities, A Tour of JavaScript-A Tour of JavaScript

reference documentation]], Preface

JavaScript standard library Console API, The Console API-Formatted]] Output with Console

dates and times, Dates and Times-Formatting]] and Parsing Date Strings

error classes, Error Classes-Error Classes

internationalization]] API, The Internationalization]] API-Comparing Strings

JSON serialization]] and parsing, JSON Serialization]] and Parsing-JSON Customization]]s

overview of, The JavaScript Standard Library

pattern matching, Pattern Matching with Regular Expressions-exec()

sets and maps, Sets and Maps-Weak Map and Weak Set

timer]]s, Timer]]s-Timer]]s

typed arrays and binary data, Typed Arrays and Binary Data-Data View and Endianness

URL APIs, URL APIs-Legacy URL Functions

Jest, Unit Testing with Jest

join() method, Array to String Conversions

JSON serialization]] and parsing, JSON Serialization]] and Parsing-JSON Customization]]s

JSON.parse() function, Serializing Objects, JSON Serialization]] and Parsing

JSON.stringify() function, Serializing Objects, The toJSON() Method, JSON Serialization]] and Parsing

JSX language extension, JSX: Markup]] Expressions in JavaScript-JSX: Markup]] Expressions in JavaScript

jump [[statements, Statements, Jumps-try/catch/finally break statements, break

continue statements, continue

definition of term, Statements

labeled statements, Labeled Statements

overview of, Jumps

return statements, return

K

keywordsa[[sync keyword, a[[sync and await-Implementation]] Details

await keyword, a[[sync and await-Implementation]] Details

case sensitivity, The Text of a JavaScript Program

class keyword, Classes with the class Keyword-Example: A Complex Number Class

const keyword, Declarations with let and const

export keyword, Modules in ES6

function keyword, Defining Functions

function

keyword, Generators

import keyword, Modules in ES6

let keyword, A Tour of JavaScript, Declarations with let and const, const, let, and var

new keyword, Creating Objects]] with new, Constructor Invocation

reserved words, Reserved Words, Primary Expressions

this [[keyword, A Tour of JavaScript, Primary Expressions, Function Invocation

var keyword, Variable Declarations with var, const, let, and var

yield

keyword, yield* and Recursive Generators

Koch snowflakes, Trans[[formation]] example

L

labeled statements, Labeled Statements

last Index property, exec()

last IndexOf]]() method, indexOf]]() and last IndexOf]]()

less than]] operator (<)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

less than or equal to operator (⇐)overview of, Comparison Operators

string comparison, Working with Strings

type conversions, Special case operator conversions

let keyword, A Tour of JavaScript, Declarations with let and const, const, let, and var

lexical scoping, Closures

lexical structure, Lexical Structure-Summary case sensitivity, The Text of a JavaScript Program

comments, Comments

identifiers, The Text of a JavaScript Program-Identifiers and Reserved Words

line breaks, The Text of a JavaScript Program

literals, Literals

reserved words, Reserved Words, Primary Expressions

semicolons, Optional Semicolons-Optional Semicolons

spaces, The Text of a JavaScript Program

Unicode character set escape sequences, Unicode Escape Sequences

normalization, Unicode Normalization

overview of, Unicode

line breaks, The Text of a JavaScript Program, Optional Semicolons-Optional Semicolons

line styles, Line styles

line terminators, The Text of a JavaScript Program

linting tools, Linting with ES Lint

literalsnumeric floating-point literals, Floating-Point Literals, Binary Floating-Point and Rounding Errors

integer literals, Integer Literals

negative numbers, Numbers

separators in, Floating-Point Literals

regular expressions, Pattern Matching, Pattern Matching with Regular Expressions

string, String Literals

template literals, Template Literals, Template Tags

little-endian architecture, Data View and Endianness

load event, Execution of JavaScript Programs

local Storage property, local Storage and session Storage

location property, Location, Navigation, and Hi[[story

logical operators, A Tour of JavaScript, Logical Expressions-Logical NOT (!)

lookbehind assertion]]s, Specifying match position

looping]] statementsdo/while loops, do/[[while

for [[loops, for, Iterating Arrays

for/await loops, A[[synchronous]] iteration with for/await, A[[synchronous]] Iteration

for/in loops, for/in, Enumerating Properties

for/of loops, for/of-for/in, Iterating Arrays, Iterators and Generators

purpose of, Statements

while loops, while

l[[value, Operand and Result Type

M

magnetometers, Mobile Device]] APIs

Mandelbrot set, Example: The Mandelbrot Set-Summary and Suggestions for Further [[Reading

Map class, for/of with Set and Map, The Map Class-The Map Class

Map objects, Overview and Definitions, The Map Class

map() method, map()

marshaling, JSON Serialization]] and Parsing

match() method, match()

matchAll() method, matchAll()

matches]]() method, Selecting]] elements with CSS selector]]s

Math.pow function, Arithmetic Expressions

mathematical]] operations, Arithmetic in JavaScript-Arithmetic in JavaScript

MDN web site, Preface

media APIs, Media APIs

memoization, Memoization

memory management]], Overview and Definitions

message events, Client-side JavaScript th[[reading model, Events, Server-Sent Events, Worker Objects-The Global Object in Workers, Worker Execution Model-post Message(), Message Ports, and Message Channels, Cross-Origin Messaging with post Message(), fork()-Worker Threads, Communication Channels and Message Ports, Enumerated Types and Discriminated Unions

Message Channels, post Message(), Message Ports, and Message Channels

Message Port objects, post Message(), Message Ports, and Message Channels, Communication Channels and Message Ports

messaging Web Socket API receiving messages, Receiving messages from a Web Socket

sending]] messages, Sending]] messages over a Web Socket

worker threads and messaging, Worker Threads and Messaging-Cross-Origin Messaging with post Message()cross-origin messaging, Cross-Origin Messaging with post Message(), Cross-Origin Messaging with post Message()

execution model, Worker Execution Model

importing code, Importing Code into a Worker

Mandelbrot set example, Example: The Mandelbrot Set-Summary and Suggestions for Further [[Reading

modules, Importing Code into a Worker

overview of, Worker Threads and Messaging

post Message(), Message Ports and Message Channels, post Message(), Message Ports, and Message Channels

Worker objects, Worker Objects

Worker Global Scope object, The Global Object in Workers

meta programming, Meta programming

methodsadding methods to existing classes, Adding Methods to Existing Classes

array methodsgeneric application of, Arrays

overview of, Array Methods

class versus instance methods, Static Methods

creating, A Tour of JavaScript

definition of term, Functions, Method Invocation

method chaining]], Method Invocation

method invocation, Invocation Expressions, Method Invocation-Method Invocation

shorthand methods, Getters, Setters, and other Method Forms

shorthand syntax, Shorthand Methods

static methods, Static Methods

typed array methods, Typed Array Methods and Properties

minus sign (-)subtr[[action operator, Arithmetic in JavaScript, Arithmetic Expressions

unary arithmetic operator, Unary Arithmetic Operators

mobile device]] APIs, Mobile Device]] APIs

modulesautomating closure-based modularity, Automating Closure-Based Modularity

in ES6 dynamic imports with import(), Dynamic Imports with import()

exports, ES6 Exports

import.meta.url, import.meta.url

imports, ES6 Imports-ES6 Imports

imports and exports with re[[naming, Imports and Exports with Re[[naming

JavaScript modules on the web, JavaScript Modules on the Web-JavaScript Modules on the Web

overview of, Modules in ES6

re-exports, Re-Exports

fs module (Node), Working with Files-Working with Directories]]

import and export directive]]s, Modules

in Node, Modules in Node-Node-Style Modules on the Web, Node ModulesNode exports, Node Exports

Node imports, Node Imports

Node-style modules on the web, Node-Style Modules on the Web

overview of, Modules

purpose of, Modules

using in workers, Importing Code into a Worker

with classes, objects, and closures, Modules with Classes, Objects, and Closures-Automating Closure-Based Modularity

modulo operator (%), Arithmetic in JavaScript, Arithmetic Expressions

multiplication operator (*), Arithmetic in JavaScript, Expressions and Operators, Arithmetic Expressions

multith[[readed]] programming, Node Is A[[synchronous]] by De[[fault, Worker Threads

mutability, Overview and Definitions, Introduction to Objects

N

named]] capture groups, Alter nation, grouping]], and references

NaN (not-a-[[number value), Arithmetic in JavaScript

navigator.media Devices.get User Media() function, Media APIs

navigator.vibrate() method, Mobile Device]] APIs

negative infinity value, Arithmetic in JavaScript

negative zero, Arithmetic in JavaScript

nested]] functions, Nested]] Functions

net work events, Net work Events

net working, Net working-Protocol negotiation f[[etch]]() method aborting requests, Aborting a request

cross-origin requests, Cross-origin requests

examples of, f[[etch]]()

file up[[load, File up[[load with f[[etch]]()

HTTP status codes, response header]]s, and net work errors, HTTP status codes, response header]]s, and net work errors

miscellaneous request options, Miscellaneous request options

parsing response bodies, Parsing response bodies

setting request header]]s, Setting request header]]s

setting request parameters, Setting request parameters

specifying request method and request body, Specifying the request method and request body

steps of, f[[etch]]()

streaming response bodies, Streaming response bodies

overview of, Net working

server-sent events, Server-Sent Events

Web Socket API, Web Sockets]]

XML Http Request API (XHR), f[[etch]]()

new keyword, Creating Objects]] with new, Constructor Invocation

new.target expression, Classes and Constructors

new[[line (\n), String Literals, Escape Sequences in String Literals

new[[lines, Optional Semicolons-Optional Semicolonsusing for code formatting]], The Text of a JavaScript Program

Node a[[synchronous]] iteration in, The for/await Loop, Node Is A[[synchronous]] by De[[fault-Node Is A[[synchronous]] by De[[fault

benefits of, Introduction to JavaScript, Server-ide JavaScript with Node

BigInt type, Arbitrary Precision Integers with BigInt

buffers, Buffers

call[[backs and events in, Call[[backs and Events in Node

child processes, Working with Child Processes-fork()

defining feature of, Server-ide JavaScript with Node

events and Event Emitter, Events and Event Emitter

file handling, Working with Files-Working with Directories]]directories]], Working with Directories]]

file meta data, File Meta data

file mode strings, Writing Files

file operations, File Operations

overview of, Working with Files

paths, file de[[scriptor]]s, and File Handles, Paths, File De[[scriptor]]s, and File Handles

reading files, Reading Files

writing files, Writing Files

HTTP clients and servers, HTTP Clients and Servers-HTTP Clients and Servers

installing]], Exploring JavaScript, Server-ide JavaScript with Node

Intl API, The Internationalization]] API

modules in, Modules in Node-Node-Style Modules on the Web

non-HTTP net work servers and clients, Non-HTTP Net work Servers and Clients

parallelism with, Node Is A[[synchronous]] by De[[fault

process details, Process, CPU, and Operating System Details

programming basics]], Node Programming Basics]]-The Node Package Manager]]command]] line arguments, Command]] Line Arguments and Environment Variables

console output, Console Output

environment variables, Command]] Line Arguments and Environment Variables

modules, Node Modules

package manager]], The Node Package Manager]]

program life cycle, Program Life Cycle

reference documentation]], Preface

streams]], Streams]]-Paused mode a[[synchronous]] iteration in, A[[synchronous]] Iteration

overview of, Streams]]

pipes, Pipes

reading with events, Reading Streams]] with Events

types of, Streams]]

writing to and handling back pressure, Writing to Streams]] and Handling Back pressure

worker threads, Worker Threads-Sharing Typed Arrays Between Th[[readscommunication channels and Message Ports, Communication Channels and Message Ports

creating workers and passing]] messages, Creating Workers and Passing]] Messages

overview of, Worker Threads

sharing typed arrays between th[[reads, Sharing Typed Arrays Between Th[[reads

transfer ring Message Ports and typed arrays, Transfer ring Message Ports and Typed Arrays

worker execution environment, The Worker Execution Environment

Node Lists, Selecting]] elements with CSS selector]]s

non-inherited]] properties, Introduction to Objects

non-[[strict inequality operator (!relational expressions, Equality and Inequality Operators

type conversions, Special case operator conversions

normalization, Unicode Normalization

not-a-[[number value (NaN), Arithmetic in JavaScript

Notifications API, Progressive]] Web Apps and Service Workers

npm package manager]], Package Management]] with npm

null values, null and undefined

nullish coalescing]] operator (??), First-Defined (??)

Number type 64-[[bit floating-point format, Numbers

arbitrary precision integers with BigInt, Arbitrary Precision Integers with BigInt

arithmetic and complex math, Arithmetic in JavaScript-Arithmetic in JavaScript

binary floating-point and rounding errors, Binary Floating-Point and Rounding Errors

dates and times, Dates and Times

floating-point literals, Floating-Point Literals

integer literals, Integer Literals

separators in numeric literals, Floating-Point Literals

Number() function, Explicit Conversions, Explicit Conversions

Number.isFinite() function, Arithmetic in JavaScript

numbers, formatting]] for internationalization]], Formatting]] Numbers-Formatting]] Numbers

numeric literals, Numbers

O

object literalsextended syntax for, Extended Object Literal Syntax-Property Getters and Setters]]

overview of, Object and Array Initializers

simplest]] form of, Object Literals

object property names, Reading and Writing Array Elements

object-oriented]] programming definition of term, Overview and Definitions

example of, A Tour of JavaScript

Object.assign() function, Extending Objects

Object.create() function, Object.create(), Property Attributes

Object.define Properties() method, Property Attributes

Object.define Property() method, Property Attributes

Object.entries() method, for/of with objects

Object.getOwnProperty Names() function, Enumerating Properties

Object.getOwnProperty Symbols() function, Enumerating Properties

Object.keys method, for/of with objects

Object.keys() function, Enumerating Properties

Object.prototype, Prototypes, Object Methods

objectsArguments object, The Arguments Object

array-like objects, Array-Like Objects-Array-Like Objects

creating, Creating Objects]]-Object.create()

deleting properties, Deleting Properties

enumerating properties, Enumerating Properties

extended object literal syntax, Extended Object Literal Syntax-Property Getters and Setters]]

extending objects, Extending Objects

implementing]] iterable objects, Implementing]] Iterable Objects-Implementing]] Iterable Objects

introduction to, Objects

modular programming with, Modules with Classes, Objects, and Closures

mutable object references, Immutable Primitive Values and Mutable Object References, Introduction to Objects

naming properties within, Reserved Words

object creation expressions, Object Creation Expressions

object extensibility, Object Extensibility

object methods, Object Methods-The toJSON() Method

overview of, A Tour of JavaScript, Overview and Definitions-Overview and Definitions

querying and setting properties, Querying and Setting Properties-Property Access Errors

serializing objects, Serializing Objects

testing properties, Testing Properties

onmessage event, Receiving messages from a Web Socket, Worker Objects-The Global Object in Workers, post Message(), Message Ports, and Message Channels, Cross-Origin Messaging with post Message()

operatorsarithmetic operators, A Tour of JavaScript, Arithmetic in JavaScript-Arithmetic in JavaScript, Arithmetic Expressions-Bitwise Operators

assignment operators, Assignment Expressions-Assignment with Operation

binary operators, Number of Operands

comparison operators, Comparison Operators

equality and inequality operators, Equality and Inequality Operators

equality operators, A Tour of JavaScript

forming expressions with, A Tour of JavaScript, Expressions and Operators

logical operators, A Tour of JavaScript, Logical Expressions-Logical NOT (!)

miscellaneous operatorsawait operator, The await Operator

comma operator (,), The comma Operator (,)

conditional operator (?:), The Conditional Operator (?:)

delete operator, The delete Operator

first-defined operator (??), First-Defined (??)

typeof operator, The typeof Operator

void operator, The void Operator

number of operands, Number of Operands

operand and result type, Operand and Result Type

operator associativity, Operator Associativity

operator precedence, Operator Precedence

operator side effects, Operator Side Effects

order of evaluation, Order of Evaluation

overview of, Operator Overview

post fix operators, Optional Semicolons

relational operators, A Tour of JavaScript, Relational Expressions-The instanceof Operator

table of, Operator Overview

ternary operators, Number of Operands

optional semicolons, Optional Semicolons-Optional Semicolons

over[[flow, Arithmetic in JavaScript

own properties, Introduction to Objects, Inheritance

P

package manager]] (Node), The Node Package Manager]], Package Management]] with npm

parallelization, Node Is A[[synchronous]] by De[[fault

parameterization]], Functions

parse Float() function, Explicit Conversions

parse Int() function, Explicit Conversions

pass words, Storage

paths, Paths and Polygons-Paths and Polygons

pattern matching defining regular expression salternation, grouping]], and references, Alter nation, grouping]], and references

character classes, Character classes

flags, Flags

literal characters, Literal characters

lookbehind assertion]]s, Specifying match position

named]] group captures, Alter nation, grouping]], and references

non-greedy]] repetition, Non-greedy]] repetition

pattern specification]]s, Defining Regular Expressions

repetition characters, Repetition

specifying match position, Specifying match position

Unicode character classes, Character classes

overview of, Pattern Matching with Regular Expressions

pattern-matching symbols, Pattern-Matching Symbols

RegExp class exec() method, exec()

last Index property and RegExp reuse, exec()

overview of, The RegExp Class

RegExp properties, RegExp properties

test() method, test()

string methods formatch(), match()

matchAll(), matchAll()

replace(), replace()

search(), String Methods for Pattern Matching

split(), split()

syntax for, Pattern Matching

patterns, Colors, patterns, and gradients

Payment Request API, Crypto]]graphy]] and Related APIs

Per[[formnce]] APIs, Per[[formnce]]

pickling]], JSON Serialization]] and Parsing

pixels, Document Co[[ordinates and View port Co[[ordinates, Pixel Manipulation

plus sign (+)additive and assignment operator (+, Assignment with Operation

additive operator, Arithmetic in JavaScript, The + Operator

string concatenation, String Literals, Working with Strings, The + Operator

type conversions, Special case operator conversions

unary arithmetic operator, Unary Arithmetic Operators

polygons, Paths and Polygons-Paths and Polygons

pop() method, Stacks and Queues with push(), pop(), shift(), and unshift()

pop state event, Event Categories, Hi[[story Management]] with push State()-Net working

positive zero, Arithmetic in JavaScript

possessives, String Literals

post fix operators, Optional Semicolons

post Message() method, post Message(), Message Ports, and Message Channels

Prettier, JavaScript Formatting]] with Prettier

primary expressions, Primary Expressions

primitive typesBoolean truth values, Boolean Values-Boolean Values

immutable primitive values, Immutable Primitive Values and Mutable Object References

Number type, Numbers-Dates and Times

overview and definitions, Overview and Definitions

String type, Text-Tagged template literals

print props() function, Function Declarations

private fields, Public, Private, and Static Fields

procedures, Functions

programserror handling, Program Errors

execution of JavaScript, Execution of JavaScript Programs-Client-side JavaScript time line client-side th[[reading model, Client-side JavaScript th[[reading model

client-side time line, Client-side JavaScript time line

input and output, Program Input and Output

Progressive]] Web Apps (PWAs), Progressive]] Web Apps and Service Workers

Promise chains, Promises, Chaining]] Promises-Chaining]] Promises

Promise.all() function, Promises in Parallel

Promiseschaining]] Promises, Chaining]] Promises-Chaining]] Promises

error handling with, Handling errors with Promises, More on Promises and Errors-The catch and finally methods

making Promises, Making Promises-Promises in Sequence based on other Promises, Promises based on other Promises

based on syn chronous]] values, Promises based on syn chronous]] values

from scratch, Promises from scratch

overview of, Promises

parallel operations, Promises in Parallel

Promises in sequence, Promises in Sequence-Promises in Sequence

re[[solving Promises, Re[[solving Promises-More on Promises and Errors

returning]] from Promise call[[backs, The catch and finally methods

terminology, Handling errors with Promises

using, Using Promises-Handling errors with Promises

properties computed property names, Computed Property Names

conditional property access, Conditional Property Access

copying]] from one object to another, Extending Objects

defining your own function properties, Defining Your Own Function Properties

definition of term, Overview and Definitions

deleting, Deleting Properties

enumerating properties, Enumerating Properties

inheriting]], Inheritance

naming, Symbols, Introduction to Objects, Symbols as Property Names

non-inherited]] properties, Introduction to Objects

property access errors, Property Access Errors

property access expressions, Property Access Expressions

property attributes, Introduction to Objects, Property Attributes-Property Attributes

property de[[scriptor]]s, Property Attributes

property getters and setters]], Property Getters and Setters]]

querying and setting, Querying and Setting Properties-Property Access Errors

testing, Testing Properties

typed array properties, Typed Array Methods and Properties

propertyIsEnumerable]]() method, Testing Properties

prototypal [[inheritance, Introduction to Objects, Inheritance

prototype chains, Prototypes

prototypes, Prototypes, Inheritance, The prototype Property, Classes and Prototypes, The prototype Attribute

proxy in[[variants, Proxy In[[variants

Proxy objects, Proxy Objects-Proxy In[[variants

pseudo random [[numbers, Crypto]]graphy]] and Related APIs

public fields, Public, Private, and Static Fields

Push API, Progressive]] Web Apps and Service Workers

push() method, A Tour of JavaScript, Stacks and Queues with push(), pop(), shift(), and unshift()

Q

quadratic CurveTo() method, Curves

query Selector]]() method, Selecting]] elements with CSS selector]]s

query Selector]]All() method, Selecting]] elements with CSS selector]]s

quote marksdouble quotes (“), String Literals

single quotes ('), String Literals

R

React, JSX: Markup]] Expressions in JavaScript

rectangles, Rectangles

recursive functions, Function Invocation

recursive generators, yield

and Recursive Generators

reduce() method, reduce() and reduce Right()

reduce Right() method, reduce() and reduce Right()

reference types, Immutable Primitive Values and Mutable Object References

Reflect API, The Reflect API-The Reflect API

Reflect.ownKeys() function, Enumerating Properties

RegExp class exec() method, exec()

last Index property and RegExp reuse, exec()

overview of, The RegExp Class

RegExp properties, RegExp properties

test() method, test()

RegExp type, Overview and Definitions, Pattern Matching, Pattern Matching with Regular Expressions (see also pattern matching)

regular expressions, Pattern Matching with Regular Expressions(see also pattern matching)

relational expressions, Relational Expressions-The instanceof Operator

relational operators, A Tour of JavaScript

replace() method, Working with Strings

require() function, Node Imports

reserved words, Reserved Words, Primary Expressions

rest parameters, Rest Parameters and Variable-Length Argument Lists

return statements, return

return values, Functions

return() method, “Closing” an Iterator: The Return Method, The return() and throw() Methods of a Generator

re[[verse() method, A Tour of JavaScript, re[[verse()

rounding errors, Binary Floating-Point and Rounding Errors

S

same-origin policy, The same-origin policy

scalable]] vector graphic]]s]] (SVG), SVG: Scalable]] Vector Graphic]]s]]-Creating SVG Images with JavaScript creating SVG images with JavaScript, Creating SVG Images with JavaScript

overview of, SVG: Scalable]] Vector Graphic]]s]]

scripting SVG, Scripting SVG

SVG in HTML, SVG in HTML

Screen Orientation API, Mobile Device]] APIs

sc[[roll offsets, Document Co[[ordinates and View port Co[[ordinates

sc[[rolling, Sc[[rolling

sc[[rollTo() method, Sc[[rolling

search() method, String Methods for Pattern Matching

security client-side storage, Storage

competing goals of web programming, The Web Security Model

Cross-Origin Re[[source Sharing (CORS), The same-origin policy, Cross-origin requests

cross-site scripting (XSS), Cross-site scripting

crypto]]graphy APIs, Crypto]]graphy]] and Related APIs

defense against malicious code, What JavaScript can't do

denial-of-[[service attacks, Writing to Streams]] and Handling Back pressure

same-origin policy, The same-origin policy

web plat[[form features to investigate, Security

semicolon (;), Optional Semicolons-Optional Semicolons

sensitive in[[formation]], Storage

Sensor API, Mobile Device]] APIs

serialization, Serializing Objects, JSON Serialization]] and Parsing, Hi[[story Management]] with push State()

server-sent events, Server-Sent Events-Server-Sent Events

server-side JavaScript, JavaScript in Web Browsers, Server-ide JavaScript with Node

Service Workers, Progressive]] Web Apps and Service Workers

session Storage property, local Storage and session Storage

Set class, for/of with Set and Map, The Set Class-The Set Class

Set objects, Overview and Definitions

Set() constructor, The Set Class

set Interval() function, Timer]]s

sets and mapsdefinition of sets, The Set Class

Map class, The Map Class-The Map Class

overview of, Sets and Maps

Set class, The Set Class-The Set Class

Weak Map and Weak Set classes, Weak Map and Weak Set

setter methods, Property Getters and Setters]], Getters, Setters, and other Method Forms

set Timeout]]() function, Timer]]s, Timer]]s

set Trans[[form() method, Co[[ordinate System Trans[[forms

shadow DOM, Shadow DOM-Shadow DOM API

shadows, Shadows

shift left operator («), Bitwise Operators

shift right with sign operator (»), Bitwise Operators

shift right with zero fill operator (»>), Bitwise Operators

shift() method, Stacks and Queues with push(), pop(), shift(), and unshift()

shorthand methods, Shorthand Methods, Getters, Setters, and other Method Forms

side effects, Operator Side Effects

single quotes ('), String Literals

slice() [[method, slice()

some() method, every() and some()

sort order, Comparing Strings

sort() method, Conditional Invocation, sort()

sparse arrays, Arrays, Sparse Arrays

splice() method, splice()

split() method, split()

spread operator (…), Spread Operator, The Spread Operator, The Spread Operator for Function Calls, Iterators and Generators

square brackets ([]), A Tour of JavaScript, Working with Strings, Object and Array Initializers, Querying and Setting Properties, Reading and Writing Array Elements, Strings as Arrays

standard library (see JavaScript standard library)

statement b[[locks, Compound and Empty Statements

statements (see also declarations)compound and empty statements, Compound and Empty Statements

conditional statements, Statements, Conditionals-switch

control structures, A Tour of JavaScript-A Tour of JavaScript, Statements

expression statements, Expression Statements

versus expressions, A Tour of JavaScript

if/else statement, Boolean Values

jump [[statements, Statements, Jumps-try/catch/finally

line breaks and, Optional Semicolons-Optional Semicolons

list of, Summary of JavaScript Statements

loops, Statements, Loops-for/in

miscellaneous statementsdebugger statements, debugger

use [[strict directive]], “use [[strict”

with [[statements, Miscellaneous Statements

overview of, Statements

separating with semicolons, Optional Semicolons-Optional Semicolons

throw statements, throw

try/catch/finally statements, try/catch/finally-try/catch/finally

yield statements, yield, The Value of a yield Expression

static fields, Public, Private, and Static Fields

static methods, Static Methods

storage, Storage-Indexed]]DB cookie]]s, Cookie]]s

Indexed]]DB, Indexed]]DB

local Storage and session Storage, local Storage and session Storage

overview of, Storage

security and privacy, Storage

streams]] (Node), Streams]]-Paused mode a[[synchronous]] iteration in, A[[synchronous]] Iteration

overview of, Streams]]

pipes, Pipes

reading with events, Reading Streams]] with Events

types of, Streams]]

writing to and handling back pressure, Writing to Streams]] and Handling Back pressure

strict equality operator (==boolean values, Boolean Values

overview of, Equality and Inequality Operators

string comparison, Working with Strings

type conversions, Overview and Definitions, Conversions and Equality

strict mode de[[fault application of, Classes with the class Keyword, Modules in ES6, JavaScript Modules on the Web

delete operator and, The delete Operator

deleting properties, Deleting Properties

eval() function, Strict eval()

function declarations, Function Declarations

function invocation, Function Invocation

versus non-strict mode, “use [[strict”-“use [[strict”

opting into, Introduction to JavaScript

Type Error, Property Access Errors, Object Extensibility

un[[declared]] variables and, Variable Declarations with var

with [[statement and, with, Setting event handler attributes

string literalsescape sequences in, Escape Sequences in String Literals

overview of, String Literals

String() function, Explicit Conversions

String.raw() function, Tagged template literals

stringsarray to string conversions, Array to String Conversions

characters and code points, Text

methods for pattern matching match(), match()

matchAll(), matchAll()

replace(), replace()

search(), String Methods for Pattern Matching

split(), split()

overview of, Text

string literals, String Literals

strings as arrays, Strings as Arrays

working withaccessing]] individual characters, Working with Strings

API for, Working with Strings

comparing, Working with Strings, Comparing Strings

concatenation, Working with Strings

determining length, Working with Strings

im[[mutability, Working with Strings

structured]] clone algorithm, Hi[[story Management]] with push State()

sub arrays, Sub arrays with slice(), splice(), fill(), and copyWithin]]()

subclasses]]class hierarchies and abstract classes]], Class Hierarchies and Abstract Classes]]-Summary

delegation versus inheritance, Delegation Instead of Inheritance

overview of, Subclasses]]

prototypes and, Subclasses]] and Prototypes

with extends clause, Subclasses]] with extends and super-Subclasses]] with extends and super

subroutines, Functions

subtr[[action operator (-), Arithmetic in JavaScript

surro[[gate pairs, Text

SVG (see scalable]] vector graphic]]s]] (SVG))

switch statements, switch-switch

Symbol.a[[sync Iterator, Symbol.iterator and Symbol.a[[sync Iterator

Symbol.hasInstance, Symbol.hasInstance

Symbol.isConcat Spreadable]], Symbol.isConcat Spreadable]]

Symbol.iterator, Well-Known Symbols

Symbol.species, Symbol.species-Symbol.species

Symbol.toPrimitive, Symbol.toPrimitive

Symbol.toString Tag, Symbol.toString Tag

Symbol.unscopables, Symbol.unscopables

Symbolsdefinition of language extensions, Overview and Definitions

property names, Symbols, Symbols as Property Names

well-known Symbols, Well-Known Symbols

syn chronous]] script execution, When scripts run: a[[sync and deferred

syntax control structures, A Tour of JavaScript-A Tour of JavaScript

declaring variables, A Tour of JavaScript

English-language comments, A Tour of JavaScript, A Tour of JavaScript

equality and relational operators, A Tour of JavaScript

expressionsforming with operators, A Tour of JavaScript

initializer expression, A Tour of JavaScript

extended for object literals, Extended Object Literal Syntax-Property Getters and Setters]]

functions, A Tour of JavaScript

lexical structure, Lexical Structure-Summary case sensitivity, The Text of a JavaScript Program

comments, Comments

identifiers, The Text of a JavaScript Program-Identifiers and Reserved Words

line breaks, The Text of a JavaScript Program

literals, Literals

reserved words, Reserved Words, Primary Expressions

semicolons, Optional Semicolons-Optional Semicolons

spaces, The Text of a JavaScript Program

Unicode character set, Unicode Escape Sequences-Unicode Normalization

logical operators, A Tour of JavaScript

methods, A Tour of JavaScript

objectsconditionally]] accessing]] properties, A Tour of JavaScript

declaring, A Tour of JavaScript

shorthand methods, Shorthand Methods

statements, A Tour of JavaScript

variables, assigning values to, A Tour of JavaScript

T

tabs, The Text of a JavaScript Program

tagged template literals, Tagged template literals, Template Tags

template literals, Template Literals, Template Tags

ternary operators, Number of Operands

test() method, test()

text drawing in Canvas, Text

escape sequences in string literals, Escape Sequences in String Literals

pattern matching, Pattern Matching

string literals, String Literals

string type representing]], Text

template literals, Template Literals

working with strings, Working with Strings

text editor]]snormalization, Unicode Normalization

using with Node, Hello World

text styles, Text styles

.then() method, Using Promises, Chaining]] Promises, More on Promises and Errors

this [[keyword, A Tour of JavaScript, Primary Expressions, Function Invocation

th[[reading, Worker Threads and Messaging, Progressive]] Web Apps and Service Workers (see also Worker API)

3D graphic]]s]], Graphic]]s]] in a <canvas>

throw statements, throw, Error Classes

throw() method, The return() and throw() Methods of a Generator

time zones, Formatting]] Dates and Times

timer]]s, Timer]]s, Timer]]s

time stamps, Dates and Times, Time stamps

toDate String() method, Formatting]] and Parsing Date Strings

toExponential]]() method, Explicit Conversions

toFixed]]() method, Explicit Conversions

toISO String() method, Formatting]] and Parsing Date Strings, JSON Customization]]s

toJSON() method, The toJSON() Method, JSON Customization]]s

toLocale Date String() method, Formatting]] and Parsing Date Strings, Formatting]] Dates and Times

toLocale String() method, The toLocale String() Method, Array to String Conversions, Formatting]] and Parsing Date Strings

toLocale Time String() method, Formatting]] and Parsing Date Strings, Formatting]] Dates and Times

tools and extensions, JavaScript Tools and Extensions-Enumerated Types and Discriminated Unionscode bundling, Code Bundling

JavaScript formatting]] with Prettier, JavaScript Formatting]] with Prettier

JSX language extension, JSX: Markup]] Expressions in JavaScript-JSX: Markup]] Expressions in JavaScript

linting with ES Lint, Linting with ES Lint

overview of, JavaScript Tools and Extensions

package management]] with npm, Package Management]] with npm

transpilation with Babel, Transpilation with Babel

type checking with Flow, Type Checking with Flow-Enumerated Types and Discriminated Unionsarray types, Array Types

class types, Class Types

enumerated types and discriminated unions, Enumerated Types and Discriminated Unions

function types, Function Types

installing]] and running, Installing]] and Running Flow

object types, Object Types

other parameterize]]d types, Other Parameterize]]d Types

overview of, Type Checking with Flow

read-only]] types, Read-Only]] Types

type aliases, Type Aliases

Type Script versus Flow, Type Checking with Flow

union types, Union Types

using type annotations, Using Type Annotations

unit testing with Jest, Unit Testing with Jest

toPrecision() method, Explicit Conversions

toString() method, Boolean Values, Explicit Conversions, The toString() and valueOf() methods, The + Operator, Equality with type conversion, The toString() Method, The toString() Method, Formatting]] and Parsing Date Strings

toTime String() method, Formatting]] and Parsing Date Strings

toUpper Case() method, Working with Strings

toUTC String() method, Formatting]] and Parsing Date Strings

trans[[formation]]s, Co[[ordinate System Trans[[forms-Trans[[formation]] example

translate() method, Co[[ordinate System Trans[[forms

translucency, Translucency and compositing

transpilation, Transpilation with Babel

truthy values, Boolean Values

try/catch/finally statements, try/catch/finally-try/catch/finally

type checking, Type Checking with Flow-Enumerated Types and Discriminated Unionsarray types, Array Types

class types, Class Types

enumerated types and discriminated unions, Enumerated Types and Discriminated Unions

function types, Function Types

installing]] and running Flow, Installing]] and Running Flow

object types, Object Types

other parameterize]]d types, Other Parameterize]]d Types

overview of, Type Checking with Flow

read-only]] types, Read-Only]] Types

type aliases, Type Aliases

Type Script versus Flow, Type Checking with Flow

union types, Union Types

using type annotations, Using Type Annotations

type conversionsequality and, Conversions and Equality, Equality with type conversion

explicit conversions, Explicit Conversions

financial and scientific data, Explicit Conversions

implicit conversions, Explicit Conversions

object to primitive conversionsalgorithms for, Object to Primitive Conversions, Object-to-primitive conversion algorithms

object-to-boolean, Object-to-boolean conversions

object-to-number, Object-to-number conversions

object-to-string, Object-to-string conversions

special case operator conversions, Special case operator conversions

toString() and valueOf() methods, The toString() and valueOf() methods

overview of, Type Conversions

typed arrayscreating, Creating Typed Arrays

Data View and endianness, Data View and Endianness

methods and properties, Typed Array Methods and Properties

overview of, Typed Arrays and Binary Data

versus regular arrays, Arrays

sharing between th[[reads, Sharing Typed Arrays Between Th[[reads

typed array types, Typed Array Types

using, Using Typed Arrays

typeof operator, The typeof Operator

typesglobal object, The Global Object-The Global Object

Number type, Numbers-Dates and Times

objects (see objects)

overview of, Types, Values, and Variables-Overview and Definitions

primitive, Overview and Definitions

RegExp, Pattern Matching-Pattern Matching

strings, Text-Tagged template literals

Symbols, Symbols-Symbols

type conversions, Type Conversions-Object-to-primitive conversion algorithms

Type Script, Type Checking with Flow

U

Uint8Array, Typed Array Types, Streaming response bodies, Buffers

unary operatorsarithmetic operators, Unary Arithmetic Operators

Boolean NOT operator (!), Boolean Values

JavaScript support for, Number of Operands

un[[declared]] variables, Variable Declarations with var

undefined values, null and undefined

under[[flow, Arithmetic in JavaScript

underscore (_), Identifiers and Reserved Words

underscores, as numeric separators (_), Floating-Point Literals

unescape() function, Legacy URL Functions

un[[handled rejection]] event, Program Errors

Unicode character set escape sequences, Unicode Escape Sequences, Escape Sequences in String Literals

JavaScript strings, Text

normalization, Unicode Normalization

overview of, Unicode

pattern matching, Character classes

space characters, The Text of a JavaScript Program

unit testing, Unit Testing with Jest

unshift() method, Stacks and Queues with push(), pop(), shift(), and unshift()

URL APIs, URL APIs-Legacy URL Functions

use [[strict directive]]de[[fault application of strict mode, Classes with the class Keyword, Modules in ES6, JavaScript Modules on the Web

delete operator and, The delete Operator

eval() function, Strict eval()

function declarations, Function Declarations

function invocation, Function Invocation

opting into strict mode, Introduction to JavaScript

strict versus non-strict mode, “use [[strict”-“use [[strict”

Type Error, Property Access Errors, Object Extensibility

un[[declared]] variables and, Variable Declarations with var

with [[statement and, with, Setting event handler attributes

use [[strict mode, Introduction to JavaScriptand global variables, Variable Declarations with var

deleting properties, Deleting Properties

UTF-16]] en[[coding, Text

V

valueOf() method, The toString() and valueOf() methods, The valueOf() Method

valuesassigning, A Tour of JavaScript

boolean values, Boolean Values-Boolean Values

falsy and truthy, Boolean Values

functions as values]], Functions as Values]]-Defining Your Own Function Properties

immutable primitive values, Immutable Primitive Values and Mutable Object References

null and undefined, null and undefined

overview of, Types, Values, and Variables-Overview and Definitions

types of, A Tour of JavaScript

var keyword, Variable Declarations with var, const, let, and var

varargs, Rest Parameters and Variable-Length Argument Lists

variable arity functions, Rest Parameters and Variable-Length Argument Lists

variablescase sensitivity, The Text of a JavaScript Program

declaration and assignment]]declarations with let and const, Declarations with let and const-Declarations and types

declarations with var, Variable Declarations with var

destructuring assignment]], Destructuring Assignment-Destructuring Assignment

overview of, A Tour of JavaScript

un[[declared]] variables, Variable Declarations with var

definition of term, Variable Declaration and Assignment

hoisted, Variable Declarations with var

naming, Reserved Words

overview of, Types, Values, and Variables-Overview and Definitions

scope of, Variable and constant scope, Nested]] Functions

variadic functions, Rest Parameters and Variable-Length Argument Lists

video streams]], Media APIs

view port, Document Co[[ordinates and View port Co[[ordinates, View port Size, Content Size, and Sc[[roll Position

void operator, The void Operator

W

Weak Map class, Weak Map and Weak Set

Weak Set class, Weak Map and Weak Set

Web Authentication API, Crypto]]graphy]] and Related APIs

web browser host environment a[[synchronous]] APIs, Events

audio APIs, Audio APIs-The Web Audio API

benefits of JavaScript, JavaScript in Web Browsers

Canvas API, Graphic]]s]] in a <canvas>-Pixel Manipulation canvas dimensions and co[[ordinates, Canvas Dimensions and Co[[ordinates

clip ping, Clip ping

co[[ordinate system trans[[forms, Co[[ordinate System Trans[[forms-Trans[[formation]] example

drawing operations, Canvas Drawing Operations

graphic]]s]] attributes, Graphic]]s]] Attributes, Saving and re[[storing graphic]]s]] state

overview of, Graphic]]s]] in a <canvas>

paths and polygons, Paths and Polygons

pixel manipulation, Pixel Manipulation

document geometry and sc[[rolling, Document Geometry and Sc[[rolling-View port Size, Content Size, and Sc[[roll Position CSS pixels, Document Co[[ordinates and View port Co[[ordinates

determining element at a point, Determining the Element at a Point

document co[[ordinates and view port co[[ordinates, Document Co[[ordinates and View port Co[[ordinates

querying geometry of elements, Querying the Geometry of an Element

sc[[rolling, Sc[[rolling

view port size, content size, and sc[[roll position, View port Size, Content Size, and Sc[[roll Position

events, Events-Dis[[patching]] Custom Eventsdis[[patching]] custom events, Dis[[patching]] Custom Events

event cancellation, Event Cancellation

event categories, Event Categories

event handler invocation, Event Handler Invocation

event propagation, Event Propagation

overview of, Events

registering]] event handlers, Registering]] Event Handlers

legacy APIs, JavaScript in Web Browsers

location, navigation, and hi[[story, Location, Navigation, and Hi[[story-Hi[[story Management]] with push State()browsing hi[[story, Browsing Hi[[story

loading]] new documents, Loading]] New Documents

overview of, Location, Navigation, and Hi[[story

Mandelbrot set example, Example: The Mandelbrot Set-Summary and Suggestions for Further [[Reading

module-a[[ware browsers, JavaScript Modules on the Web

net working, Net working-Protocol negotiation f[[etch]]() method, f[[etch]]()

overview of, Net working

server-sent events, Server-Sent Events

Web Socket API, Web Sockets]]

overview of, JavaScript in Web Browsers

scalable]] vector graphic]]s]] (SVG), SVG: Scalable]] Vector Graphic]]s]]-Creating SVG Images with JavaScript creating SVG images with JavaScript, Creating SVG Images with JavaScript

overview of, SVG: Scalable]] Vector Graphic]]s]]

scripting SVG, Scripting SVG

SVG in HTML, SVG in HTML

scripting CSS, Scripting CSS-CSS Animations and Eventscommon CSS style]]s, Scripting CSS

computed styles, Computed Styles

CSS animations and events, CSS Animations and Events

CSS classes, CSS Classes

inline styles, In[[line Styles

naming conventions, In[[line Styles

scripting style sheets, Scripting Style sheets

scripting documents, Scripting Documents-Example: Generating a Table of Contents]]document structure and traversal, Document Structure and Traversal

dynamically]] generating tables of contents]], Example: Generating a Table of Contents]]

modifying]] content, Element content as HTML

modifying]] structure, Creating, Inserting]], and Deleting Nodes

overview of, Scripting Documents

querying and setting attributes, Attributes

selecting]] document elements, Selecting]] Document Elements

storage, Storage-Indexed]]DB cookie]]s, Cookie]]s

Indexed]]DB, Indexed]]DB

local Storage and session Storage, local Storage and session Storage

overview of, Storage

security and privacy, Storage

web components, Web Components-Example: a <search-box> Web Component custom elements, Custom Elements

Document Fragment nodes, Using Web Components

HTML templates, HTML Templates

overview of, Web Components

search box example, Example: a <search-box> Web Component

shadow DOM, Shadow DOM

using, Using Web Components

web plat[[form features to investigate binary APIs, Binary APIs

crypto]]graphy]] and security APIs, Crypto]]graphy]] and Related APIs

events, Events

HTML and CSS, HTML and CSS

media APIs, Media APIs

mobile device]] APIs, Mobile Device]] APIs

Per[[formnce]] APIs, Per[[formnce]]

Progressive]] Web Apps and Service Workers, Progressive]] Web Apps and Service Workers

security, Security

Web Assembly, Web Assembly

Window and Document object features, More Document and Window Features

web programming basics]]Document Object Model (DOM), The Document Object Model-The Document Object Model

execution of JavaScript programs, Execution of JavaScript Programs-Client-side JavaScript time line

global object in web browsers, The Global Object in Web Browsers

JavaScript in HTML <[[script> tags, JavaScript in HTML <script> Tags-Loading]] scripts on [[demand

program errors, Program Errors

program input and output, Program Input and Output

scripts sharing namespaces, Scripts Share a Namespace

web security model, The Web Security Model-Cross-site scripting

worker threads and messaging, Worker Threads and Messaging-Cross-Origin Messaging with post Message()

web developer tools, Exploring JavaScript

Web Manifest, Progressive]] Web Apps and Service Workers

Web Workers API, Client-side JavaScript th[[reading model, Worker Threads

Web Assembly, Web Assembly

Web Audio API, The Web Audio API

WebRTC API, Media APIs

Web Socket API creating, connecting]] and dis connecting]] Web Sockets]], Creating, connecting]], and dis connecting]] Web Sockets]]

overview of, Web Sockets]]

protocol negotiation, Protocol negotiation

receiving messages, Receiving messages from a Web Socket

sending]] messages, Sending]] messages over a Web Socket

while loops, while

with [[statements, Miscellaneous Statements

Worker API cross-origin messaging, Cross-Origin Messaging with post Message()

errors, Errors in Workers

execution model, Worker Execution Model

importing code, Importing Code into a Worker

Mandelbrot set example, Example: The Mandelbrot Set-Summary and Suggestions for Further [[Reading

modules, Importing Code into a Worker

overview of, Worker Threads and Messaging

post Message(), Message Ports and Message Channels, post Message(), Message Ports, and Message Channels

Worker objects, Worker Objects

Worker Global Scope object, The Global Object in Workers

writable attribute, Introduction to Objects, Property Attributes

X

XML Http Request API (XHR), f[[etch]]()

XSS (cross-site scripting), The same-origin policy

Y

yield statements, yield, The Value of a yield Expression

yield

keyword, yield* and Recursive Generators

Z

zero negative zero, Arithmetic in JavaScript

positive zero, Arithmetic in JavaScript

zero-[[based arrays, Arrays

Fair Use Sources

Fair Use Sources:

B088P9Q6BB (JSDefGd 2020)
JavaScript - The Definitive Guide on DuckDuckGo
JavaScript - The Definitive Guide on GitHub
JavaScript - The Definitive Guide for Archive Access for Fair Use Preservation, quoting, paraphrasing, excerpting and/or commenting upon

GPT o1 Pro mode:

JavaScript Vocabulary List (Sorted by Popularity)

GPT4o:

AbortController, Absolute URLs, Abstract Equality Comparison, Abstract Syntax Tree, Accessor Properties, ActiveXObject, AddEventListener Method, AJAX Calls, AJAX Polling, Alert Dialogs, Alignment of Elements, All Settled Method in Promises, Animation Frames, Anonymous Functions, API Fetching, Application Cache, Arguments Object, Arrow Functions, Art Direction in Web Design, Asynchronous Iterators, Asynchronous Programming, Async Functions, Attribute Nodes, AudioContext API, Augmented Reality in Web, Authentication Tokens, Automatic Semicolon Insertion, Autoplay Attribute, Await Expression, Backbone of JavaScript Applications, Background Scripts, Backwards Compatibility in JavaScript, Base64 Encoding, Beforeunload Event, Best Practices in JavaScript, Binary Data Handling, Binary Heap in JavaScript, Binding of Functions, Blob Objects, Block-Level Scope, Boolean Objects, Bounding Client Rect, Box Model in CSS, Break and Continue Statements, Broadcast Channels, Browser Compatibility, Browser Event Model, Browser Object Model, Buffer Objects, Built-in Objects, Button Elements, Cache API, Callback Functions, Call Method, Canvas API, Caret Position, Cascading Style Sheets Integration, Case Sensitivity in JavaScript, Change Detection, Character Encoding, Child Nodes, Class Declarations, Class Expressions, Client-Side Rendering, Clipboard API, Closures in JavaScript, Coding Conventions, Collection Objects, Color Depth Detection, Comma Operator, Comparison Operators, Compatibility Mode, Computed Properties, Conditional Comments, Conditional Operator, Console Object, Constructor Functions, Content Security Policy, Context Menu Events, Control Flow in JavaScript, Cookies Management, Copy Event, Cordova Integration, CORS (Cross-Origin Resource Sharing), Create Document Fragment, Crypto API, CSS Object Model, Custom Elements, Custom Events, Data Attributes, Data Binding in JavaScript, Data Types in JavaScript, Data URLs, Date and Time Functions, Debugger Statements, Debugging JavaScript Code, Decimal Numbers, Default Parameters, Deferred Scripts, Delay Function Execution, Delete Operator, Destructuring Assignment, Device Orientation Events, Dialog Element, Difference Between Var, Let, and Const, Digital Certificates in Web, Dimension Properties, Direction Property in CSS, Directive Prologue, Disable Right-Click, Discouraged Practices, DispatchEvent Method, Display Property in CSS, Document Base URL, Document Fragment, Document Object Model (DOM), Document Type Declaration, Doctype in HTML5, Do...While Loop, Drag and Drop API, Dynamic Imports, Dynamic Typing, E4X (ECMAScript for XML), ECMAScript Language Specification, ECMAScript Modules, Edit Distance Algorithm, Element Interface, Element Sizing, Element Traversal, Ember.js Integration, Empty Statements, EncodeURI Function, Encryption in Web Applications, Endless Scrolling Techniques, Engine Differences, Enhanced Object Literals, Enums in JavaScript, Environment Records, Error Handling in JavaScript, Error Objects, Escape Sequences, Eval Function, Event Bubbling, Event Capturing, Event Delegation, Event Handlers, Event Loop in JavaScript, Event Propagation, Event Queue, Event Source Interface, Event Target Interface, Exception Handling, Exec Command, Exponential Operator, Export Statements, Expressions in JavaScript, Extended Object Properties, Extensible Markup Language (XML), Fetch API, Fieldsets in Forms, File API, FileReader Object, Filter Method in Arrays, FinalizationRegistry, Find Method in Arrays, First-Class Functions, Floating Point Arithmetic, Focus Management, Font Loading API, Form Data Validation, Form Submission, FormData Object, Fragment Identifiers, Frame Timing API, Fullscreen API, Function Declarations, Function Expressions, Function Parameters, Function Scope, Functional Programming in JavaScript, Gamepad API, Garbage Collection in JavaScript, Generators in JavaScript, Geolocation API, getComputedStyle Method, getElementById Method, getElementsByClassName Method, getElementsByTagName Method, Global Execution Context, Global Object, Global Scope, GlobalThis Object, Grammar and Types in JavaScript, Grid Layout in CSS, GroupBy Functionality, Hash Tables in JavaScript, History API, Hoisting in JavaScript, Horizontal Rule Element, HTML Canvas Element, HTML Collection, HTML Templates, HTML5 Features, HTTP Requests, HTTP Response Codes, Hyperlinks in HTML, IIFE (Immediately Invoked Function Expression), Image Manipulation in Canvas, Image Preloading Techniques, Import Statements, In Operator, Indexed Collections, IndexedDB API, Infinity Value, Inheritance Patterns, Input Events, Input Validation, Instanceof Operator, Int32Array, Intl Object, Intersection Observer API, Intl.Collator, Intl.DateTimeFormat, Intl.NumberFormat, Invalid Date Object, IsNaN Function, Iteration Protocols, JavaScript Engines, JavaScript Modules, JavaScript Object Notation (JSON), JavaScript Operators, JavaScript Regular Expressions, JavaScript Timers, Joystick Events, JSON Methods, JSON Parse and Stringify, Keydown Event, Keyboard Events, Keyframes in CSS, Label Element in Forms, Language Chains in Testing, let Keyword, Lexical Environment, Lexical Scoping, Light DOM, Line Breaks in Strings, Linear Gradient in CSS, Link Element in HTML, Local Storage, Location Object, Logical AND Operator, Logical NOT Operator, Logical OR Operator, Loops in JavaScript, Map Object in JavaScript, Map Method in Arrays, Math Object, Media Queries in CSS, MediaRecorder API, Memory Leaks in JavaScript, Message Channels, Message Event, Meta Tags in HTML, Method Chaining, MIDI Access, Mime Types, Modals in Web Design, Module Bundlers, Mouse Events, MouseEvent Object, Mutation Observers, Named Function Expressions, Namespace Objects, Native Objects in JavaScript, Navigator Object, Nested Functions, New Operator, Node Interface, NodeList Object, Node.js Integration, Nullish Coalescing Operator, Number Object, Object.create Method, Object.assign Method, Object.defineProperty, Object.entries Method, Object.freeze Method, Object.is Method, Object.keys Method, Object.seal Method, Object.values Method, Observer Pattern in JavaScript, OffscreenCanvas API, Onclick Event, Online and Offline Events, Optional Chaining Operator, Origin Property, Output Encoding, Overflow Property in CSS, Page Visibility API, PageX and PageY Properties, ParentNode Interface, parseFloat Function, parseInt Function, Partial Application, Passive Event Listeners, Path2D Objects, Performance API, Persistent Storage, Pointer Events, Pop Method in Arrays, PopStateEvent, PostMessage Method, Promise.all Method, Promise.any Method, Promise.race Method, Promises in JavaScript, Prompt Dialogs, Prototype Chain, Prototypal Inheritance, Proxy Objects in JavaScript, Push Method in Arrays, Query Selector Methods, QueueMicrotask Function, Radio Buttons in Forms, Random Numbers in JavaScript, Range Input, Readonly Properties, Reference Errors, Reflect API, Regular Expressions, Relative URLs, Rem Units in CSS, Remote Script Execution, Request Animation Frame, Resize Events, Resize Observer API, Rest Parameters, Return Statement, Revealing Module Pattern, Reverse Method in Arrays, Rich Text Editing, Robot Framework Integration, Same-Origin Policy, Screen Orientation API, Script Tag in HTML, Scroll Events, scrollIntoView Method, scrollTo Method, Selection API, Self-Invoking Functions, Semicolons in JavaScript, Server-Sent Events, Service Workers, Set Object in JavaScript, Set Timeout and Set Interval, Shadow DOM, SharedArrayBuffer, Short-Circuit Evaluation, slice Method in Arrays, sort Method in Arrays, Source Maps, Spatial Navigation, splice Method in Arrays, Spread Operator, SQL Injection Prevention, Stack Traces, State Management in Web Apps, Static Methods, Storage Event, String Methods in JavaScript, Strict Mode, Structural Typing, Style Manipulation, Subresource Integrity, switch Statement, Symbol Data Type, Synthetic Events, Tabindex Attribute, Template Literals, Temporal Dead Zone, Text Content Property, Text Direction in CSS, Text Nodes, Throttle Function, throw Statement, Timers in JavaScript, toFixed Method, toString Method, Touch Events, Touch Interface, Traceur Compiler, Transpilers, Tree Shaking, Try...Catch Statement, Type Coercion, Typed Arrays, TypeError Exceptions, typeof Operator, Underscore.js Integration, Unicode in JavaScript, Unicode Normalization, Unary Operators, Undefined Value, Unhandled Rejection, Unit Testing in JavaScript, unshift Method in Arrays, URL API, URLSearchParams, Use Strict Directive, User Timing API, Validation in Forms, ValueOf Method, Variable Hoisting, Variables in JavaScript, Vibration API, Viewport Meta Tag, Visibility Property in CSS, Void Operator, Wake Lock API, WeakMap Object, WeakRef Object, WeakSet Object, Web Animations API, Web Audio API, Web Bluetooth API, Web Components, Web Cryptography API, Web GL, Web Notifications API, Web Real-Time Communications (WebRTC), Web Sockets, Web Speech API, Web Storage API, Web Workers, WebAssembly Integration, Wheel Event, While Loop, Window Object, Window.location Property, Window.postMessage Method, Worker Threads, XML Parsing in JavaScript, XMLHttpRequest Object, XPath Evaluation, XR (Extended Reality) APIs, Yield Keyword, Z-Index Property in CSS

JavaScript: JavaScript Fundamentals, JavaScript Inventor - JavaScript Language Designer: Brendan Eich of Netscape on December 4, 1995; JavaScript DevOps - JavaScript SRE, Cloud Native JavaScript (JavaScript on Kubernetes - JavaScript on AWS - JavaScript on Azure - JavaScript on GCP), JavaScript Microservices, JavaScript Containerization (JavaScript Docker - JavaScript on Docker Hub), Serverless JavaScript, JavaScript Data Science - JavaScript DataOps - JavaScript and Databases (JavaScript ORM), JavaScript ML - JavaScript DL, Functional JavaScript (1. JavaScript Immutability, 2. JavaScript Purity - JavaScript No Side-Effects, 3. JavaScript First-Class Functions - JavaScript Higher-Order Functions, JavaScript Lambdas - JavaScript Anonymous Functions - JavaScript Closures, JavaScript Lazy Evaluation, 4. JavaScript Recursion), Reactive JavaScript), JavaScript Concurrency (WebAssembly - WASM) - JavaScript Parallel Programming - Async JavaScript - JavaScript Async (JavaScript Await, JavaScript Promises, JavaScript Workers - Web Workers, Service Workers, Browser Main Thread), JavaScript Networking, JavaScript Security - JavaScript DevSecOps - JavaScript OAuth, JavaScript Memory Allocation (JavaScript Heap - JavaScript Stack - JavaScript Garbage Collection), JavaScript CI/CD - JavaScript Dependency Management - JavaScript DI - JavaScript IoC - JavaScript Build Pipeline, JavaScript Automation - JavaScript Scripting, JavaScript Package Managers (Cloud Monk's Package Manager Book), JavaScript Modules - JavaScript Packages (NPM and JavaScript, NVM and JavaScript, Yarn Package Manager and JavaScript), JavaScript Installation (JavaScript Windows - Chocolatey JavaScript, JavaScript macOS - Homebrew JavaScript, JavaScript on Linux), JavaScript Configuration, JavaScript Observability (JavaScript Monitoring, JavaScript Performance - JavaScript Logging), JavaScript Language Spec - JavaScript RFCs - JavaScript Roadmap, JavaScript Keywords, JavaScript Operators, JavaScript Functions, JavaScript Built-In Data Types, JavaScript Data Structures - JavaScript Algorithms, JavaScript Syntax, JavaScript OOP (1. JavaScript Encapsulation - 2. JavaScript Inheritance - 3. JavaScript Polymorphism - 4. JavaScript Abstraction), JavaScript Design Patterns - JavaScript Best Practices - JavaScript Style Guide - Clean JavaScript - JavaScript BDD, JavaScript Generics, JavaScript I/O, JavaScript Serialization - JavaScript Deserialization, JavaScript APIs, JavaScript REST - JavaScript JSON - JavaScript GraphQL, JavaScript gRPC, JavaScript on the Server (Node.js-Deno-Express.js), JavaScript Virtualization, JavaScript Development Tools: JavaScript SDK, JavaScript Compiler - JavaScript Transpiler - Babel and JavaScript, JavaScript Interpreter - JavaScript REPL, JavaScript IDEs (Visual Studio Code, JavaScript Visual Studio Code, Visual Studio, JetBrains WebStorm, JetBrains JavaScript), JavaScript Debugging (Chrome DevTools), JavaScript Linter, JavaScript Community - JavaScriptaceans - JavaScript User, JavaScript Standard Library (core-js) - JavaScript Libraries (React.js-Vue.js-htmx, jQuery) - JavaScript Frameworks (Angular), JavaScript Testing - JavaScript TDD (JavaScript TDD, Selenium, Jest, Mocha.js, Jasmine, Tape Testing (test harness), Supertest, React Testing Library, Enzyme.js React Testing, Angular TestBed), JavaScript History, JavaScript Research, JavaScript Topics, JavaScript Uses - List of JavaScript Software - Written in JavaScript - JavaScript Popularity, JavaScript Bibliography - Manning JavaScript Series- JavaScript Courses, JavaScript Glossary - JavaScript Official Glossary - Glossaire de JavaScript - French, TypeScript, Web Browser, Web Development, HTML-CSS, JavaScript GitHub, Awesome JavaScript, JavaScript Versions. (navbar_javascript - see also navbar_web_development, navbar_javascript_networking, navbar_javascript_versions, navbar_javascript_standard_library, navbar_javascript_libraries, navbar_javascript_reserved_words, navbar_javascript_functional, navbar_javascript_concurrency, navbar_javascript async, navbar_typescript)

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