JS Storage Object JavaScript Window Object

Window confirm() Method

confirm()The method displays a modal dialog box with an optional message and two buttons, "OK" and "Cancel".

If the user clicks "OK", the confirm() method will return true; otherwise, it will return false.

Confirmation boxes are usually used when you want the user to verify or accept certain content.

Dialog boxes are modal windows-They prevent the user from accessing the rest of the program interface before the dialog box is closed. Therefore, you should not overuse any functions that create dialog boxes (or modal windows).

Syntax:

window.confirm(msg)

Example

var r = confirm("Click the button!");
if (r == true) {
　　　txt = "Clicked Confirm!";
} else {
　　　txt = "Clicked Cancel!";
}

Test and see‹/›

Browser Compatibility

All browsers fully support the Confirm() method:

Method
confirm()	Yes	Yes	Yes	Yes	Yes

Parameter Value

Parameter	Description
msg	(Optional) The string displayed in the confirmation box

Technical Details

Return Value:	A boolean value indicating whether "OK" or "Cancel" was selected true-The user clicks "OK" false-The user clicks "Cancel" (or the "x" (close) button in the upper right corner, available in all major browsers except Firefox)

More Examples

Confirm box with line breaks:

Example

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

Test and see‹/›

This example demonstrates the different types of dialog boxes supported by JavaScript:

Click the button below to display different dialog boxes:

Related References

Window (Window) Reference:alert() method

Window (Window) Reference:hint() method

JavaScript Window Object