Window confirm() Method

❮ Window Object


Display a confirmation box:

confirm("Press a button!");
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More "Try it Yourself" examples below.

Definition and Usage

The confirm() method displays a dialog box with a specified message, along with an OK and a Cancel button.

A confirm box is often used if you want the user to verify or accept something.

Note: The confirm box takes the focus away from the current window, and forces the browser to read the message. Do not overuse this method, as it prevents the user from accessing other parts of the page until the box is closed.

The confirm() method returns true if the user clicked "OK", and false otherwise.

Browser Support

confirm() Yes Yes Yes Yes Yes



Parameter Values

Parameter Type Description
message String Optional. Specifies the text to display in the confirm box

Technical Details

Return Value: A Boolean, indicating whether "OK" or "Cancel" was clicked in the dialog box:
  • true - the user clicked "OK"
  • false - the user clicked "Cancel" (or the "x" (close) button in the top right corner that is available in all major browsers, except Firefox)

More Examples


Display a confirmation box, and output what the user clicked:

var txt;
var r = confirm("Press a button!");
if (r == true) {
    txt = "You pressed OK!";
} else {
    txt = "You pressed Cancel!";
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Confirmation box with line-breaks:

confirm("Press a button!\nEither OK or Cancel.");
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Related Pages

Window Object: alert() Method

Window Object: prompt() Method

❮ Window Object