JavaScript/jQuery:测试窗口是否有焦点 [英] JavaScript / jQuery: Test if window has focus

问题描述

如何测试浏览器是否有焦点?

How do you test if the browser has focus?

推荐答案

我没有在其他浏览器中测试过这个，但它似乎在 Webkit 中工作.我让你试试IE.:o)

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

试试看: http://jsfiddle.net/ScKbk/

单击开始间隔后，更改浏览器窗口的焦点以查看结果变化.同样，仅在 Webkit 中进行了测试.

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);
});​

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