Standard built-in objects

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

The term "global objects" (or standard built-in objects) here is not to be confused withthe global object. Here, "global objects" refer toobjects in the global scope.

Theglobal object itself can be accessed using the this operator in the global scope. In fact, the global scopeconsists of the properties of the global object, including inherited properties, if any.

Other objects in the global scope are eithercreated by the user script or provided by the host application. The host objects available in browser contexts are documented in theAPI reference.

For more information about the distinction between theDOM and coreJavaScript, seeJavaScript technologies overview.

Standard objects by category

Value properties

These global properties return a simple value. They have no properties or methods.

Function properties

These global functions—functions which are called globally, rather than on an object—directly return their results to the caller.

Fundamental objects

These objects represent fundamental language constructs.

Error objects

Error objects are a special type of fundamental object. They include the basicError type, as well as several specialized error types.

Numbers and dates

These are the base objects representing numbers, dates, and mathematical calculations.

Text processing

These objects represent strings and support manipulating them.

Indexed collections

These objects represent collections of data which are ordered by an index value. This includes (typed) arrays and array-like constructs.

Keyed collections

These objects represent collections which use keys. The iterable collections (Map andSet) contain elements which are easily iterated in the order of insertion.