Window blur() Method

blur()The method removes the focus from the current window.

The blur() method on the program is equivalent to the user moving the focus away from the current window.

Usagefocus()The method sets the focus to the current window.

Syntax:

window.blur()

Example

var popupWindow = window.open("https://www.oldtoolbag.com");
popupWindow.blur();

All browsers fully support the blur() method:

Method
blur()	Yes	Yes	Yes	Yes	Yes

Return Value:	None

Window (Window) Reference:focus() Method