Web/API/Window/top

Returns a reference to the topmost window in the window hierarchy.

Syntax

var topWindow = window.top;

Notes

Where the window.parent property returns the immediate parent of the current window, window.top returns the topmost window in the hierarchy of window objects.

This property is especially useful when you are dealing with a window that is in a subframe of a parent or parents, and you want to get to the top-level frameset.

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'window.top' in that specification.	Living Standard
HTML5The definition of 'window.top' in that specification.	Recommendation	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
top	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' Starting in Firefox 6, this property is read only, as defined by the standard.	IE Full support 4	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

See implementation notes.'

See implementation notes.

Window.top by Mozilla Contributors is licensed under CC-BY-SA 2.5.