Question

How do you test if the browser has focus?

Answer 1

I haven’t tested this in other browsers, but it seems to work in Webkit. I’ll let you try IE. :o)

Try it out: http://jsfiddle.net/ScKbk/

After you click to start the interval, change the focus of the browser window to see the result change. Again, tested only in Webkit.

var window_focus;

$(window).focus(function() {
    window_focus = true;
}).blur(function() {
    window_focus = false;
});

$(document).one('click', function() {
    setInterval(function() {
        $('body').append('has focus? ' + window_focus + '<br>');
    }, 1000);
});​