How to return focus to the parent window - window.open?

Question

JavaScript

There is a simple window.open function:

function preview() {
 var newWin = window.open('/preview.html', 'example', 'width=600,height=400');
//onfocus/onblur
}
preview();

Task: return focus to the parent window without closing the popup! Presumably onfocus/onblur, but can't use them? Chrome browser.

Answer 1

onfocus/onblur are events for subscribing to get/lose focus. The method itself is window.focus();