Window.confirm()

The Window.confirm() method displays a modal dialog with an optional message and two buttons: OK and Cancel.

Syntax

result = window.confirm(message);

Parameters

message
A string you want to display in the alert dialog.

Return value

A boolean indicating whether OK (true) or Cancel (false) was selected. If a browser is ignoring in-page dialogs, then the returned value is always false.

Example

if (window.confirm("Do you really want to leave?")) { 
  window.open("exit.html", "Thanks for Visiting!");
}

Produces:

firefox confirm
 

Notes

The following text is shared between this article, DOM:window.prompt and DOM:window.alert Dialog boxes are modal windows ‚ÄĒ they prevent the user from accessing the rest of the program's interface until the dialog box is closed. For this reason, you should not overuse any function that creates a dialog box (or modal window). Regardless, there are good reasons to avoid using dialog boxes for confirmation.

Specification

Specification Status Comment
HTML Living Standard
The definition of 'confirm()' in that specification.
Living Standard

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
confirmChrome Full support 1
Notes
Full support 1
Notes
Notes Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3
Notes
Full support 3
Notes
Notes Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
Safari Full support 1WebView Android Full support 1
Notes
Full support 1
Notes
Notes Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
Chrome Android Full support 18
Notes
Full support 18
Notes
Notes Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
Firefox Android Full support 4Opera Android Full support 10.1
Notes
Full support 10.1
Notes
Notes Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
Safari iOS Full support 1Samsung Internet Android Full support 1.0
Notes
Full support 1.0
Notes
Notes Starting with Samsung Internet 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.

Legend

Full support  
Full support
See implementation notes.
See implementation notes.

See also