Standard built-in objects

The term "global objects" (or standard built-in objects) here is not to be confused with the global object. Here, global objects refer to objects in the global scope (but only if ECMAScript 5 strict mode is not used! Otherwise it returns undefined). The global object itself can be accessed by the this operator in the global scope. In fact, the global scope consists of the properties of the global object (including inherited properties, if any).

Other objects in the global scope are either created by the user script or provided by the host application. The host objects available in browser contexts are documented in the API reference. For more information about the distinction between the DOM and core JavaScript, see JavaScript technologies overview.

Standard objects (by category)

Value properties

Global properties returning a simple value.

• Infinity
• NaN
• undefined

Function properties

Global functions returning the result of a specific routine.

• eval()
• uneval()
• isFinite()
• isNaN()
• parseFloat()
• parseInt()
• decodeURI()
• decodeURIComponent()
• encodeURI()
• encodeURIComponent()
• escape()
• unescape()

Fundamental objects

General language objects, functions and errors.

• Object
• Function
• Boolean
• Symbol
• Error
• EvalError
• InternalError
• RangeError
• ReferenceError
• StopIteration
• SyntaxError
• TypeError
• URIError

Numbers and dates

Objects dealing with numbers, dates and mathematical calculations.

• Number
• Math
• Date

Text processing

Objects for manipulating texts.

• String
• RegExp

Indexed collections

Collections ordered by an index. Array-type objects.

• Array
• Float32Array
• Float64Array
• Int16Array
• Int32Array
• Int8Array
• Uint16Array
• Uint32Array
• Uint8Array
• Uint8ClampedArray
• ParallelArray

Keyed collections

Collections of objects as keys. Elements iterable in insertion order.

• Map
• Set
• WeakMap
• WeakSet

Structured data

Data buffers and JavaScript Object Notation.

• ArrayBuffer
• DataView
• JSON

Control abstraction objects

• Iterator
• Generator
• Promise

Reflection

• Reflect
• Proxy

Internationalization

Additions to the ECMAScript core for language-sensitive functionalities.

• Intl
• Intl.Collator
• Intl.DateTimeFormat
• Intl.NumberFormat

Other

• arguments