Window.opener

The Window interface's opener property returns a reference to the window that opened the window using open().

In other words, if window A opens window B, B.opener returns A.

Syntax

const openerWindow = window.opener

Value

A Window referring to the window that opened the current window (using window.open(), or by a link with target attribute set). If this window was not opened by being linked to or created by another, returns null.

In modern browsers, a rel="noopener noreferrer" attribute on the originating <a> element will prevent the window.opener reference from being set, in which case this property will return null.

Specifications

Browser compatibility