Window confirm()

Display a confirmation box:

confirm("Press a button!");

Confirmation box with line-breaks:

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

More examples below.

Description

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

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

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

A confirm box takes the focus away from the current window, and forces the user to read the message.

Do not overuse this method. It prevents the user from accessing other parts of the page until the box is closed.

confirm( message)

Parameter	Description
message	Optional. The text to display in the confirm box.

Type	Description
A boolean	`true` if the user clicked OK, otherwise `false`.

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

let text;
if (confirm("Press a button!") == true) {
text = "You pressed OK!";
} else {
text = "You canceled!";
}

confirm() is supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes