Standard built-in objects - JavaScript | MDN

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JavaScript technologies overview

This chapter documents all of JavaScript's standard, built-in objects, including their methods and properties.

decodeURIComponent()

encodeURIComponent()

FinalizationRegistry

AsyncGeneratorFunction

AsyncDisposableStack

Intl.DateTimeFormat

Intl.DurationFormat

Intl.RelativeTimeFormat

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This page was last modified on May 22, 2026 by MDN contributors.

Expressions and operators

Numbers and strings

Representing dates & times

Regular expressions

Indexed collections

JavaScript typed arrays

Iterators and generators