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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

openerWindow = window.opener;

Value

A Window referring to the window that called open() to open the current window, or null if this window was not opened by being linked to or created by another.

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

Example

if (window.opener != indexWin) {
  referToTop(window.opener);
}

Usage notes

When a window is opened from another window (using Window.open or a link with its target attribute set), it maintains a reference to that first window as window.opener. If the current window has no opener, this method returns null.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
openerChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

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