JavaScript Reference


Table of Content

Built-in objects
Array
ArrayBuffer
AsyncFunction
Atomics
Boolean
DataView
Date
Error
EvalError
Float32Array
Float64Array
Function
Generator
GeneratorFunction
Infinity
Int16Array
Int32Array
Int8Array
InternalError
Intl
Intl.Collator
Intl.DateTimeFormat
Intl.NumberFormat
JSON
Map
Math
NaN
Number
Object
Promise
Proxy
RangeError
ReferenceError
Reflect
RegExp
SIMD
SIMD.Bool16x8
SIMD.Bool32x4
SIMD.Bool64x2
SIMD.Bool8x16
SIMD.Float32x4
SIMD.Float64x2
SIMD.Int16x8
SIMD.Int32x4
SIMD.Int8x16
SIMD.Uint16x8
SIMD.Uint32x4
SIMD.Uint8x16
Set
SharedArrayBuffer
String
Symbol
SyntaxError
TypeError
TypedArray
URIError
Uint16Array
Uint32Array
Uint8Array
Uint8ClampedArray
WeakMap
WeakSet
WebAssembly
decodeURI()
decodeURIComponent()
encodeURI()
encodeURIComponent()
escape()
eval()
isFinite()
isNaN()
null
parseFloat()
parseInt()
undefined
unescape()
uneval()
Expressions & operators
Arithmetic operators
Array comprehensions
Assignment operators
Bitwise operators
Comma operator
Comparison operators
Conditional (ternary)
Destructuring
Expression closures
Generator comprehensions
Grouping operator
Legacy generator function expression
Logical Operators
Object initializer
Operator precedence
Property accessors
Spread syntax
async function expression
await
class expression
delete operator
function expression
function* expression
in operator
instanceof
new operator
new.target
super
this
typeof
void operator
yield
yield*
Statements & declarations
Legacy generator function
async function
block
break
class
const
continue
debugger
default
do...while
empty
export
for
for each...in
for...in
for...of
function declaration
function*
if...else
import
label
let
return
switch
throw
try...catch
var
while
with
Functions
Arguments object
Arrow functions
Default parameters
Method definitions
Rest parameters
getter
setter
Classes
constructor
extends
static
Errors
Error: Permission denied to access property "x"
InternalError: too much recursion
RangeError: argument is not a valid code point
RangeError: invalid array length
RangeError: invalid date
RangeError: precision is out of range
RangeError: radix must be an integer
RangeError: repeat count must be less than infinity
RangeError: repeat count must be non-negative
ReferenceError: "x" is not defined
ReferenceError: assignment to undeclared variable "x"
ReferenceError: can't access lexical declaration`X' before initialization
ReferenceError: deprecated caller or arguments usage
ReferenceError: invalid assignment left-hand side
ReferenceError: reference to undefined property "x"
URIError: malformed URI sequence
Warning: -file- is being assigned a //# sourceMappingURL, but already has one
Warning: 08/09 is not a legal ECMA-262 octal constant
Warning: Date.prototype.toLocaleFormat is deprecated
Warning: JavaScript 1.6's for-each-in loops are deprecated
Warning: String.x is deprecated; use String.prototype.x instead
Warning: expression closures are deprecated
Warning: unreachable code after return statement
X.prototype.y called on incompatible type
JavaScript technologies overview
Lexical grammar
JavaScript data structures
Enumerability and ownership of properties
Iteration protocols
Strict mode
Transitioning to strict mode
Template literals
Deprecated features
New in JavaScript
ECMAScript 2015 support in Mozilla
ECMAScript 5 support in Mozilla
ECMAScript Next support in Mozilla
Firefox JavaScript changelog
All pages index
Methods index
Properties index