当前页面获取、失去焦点

截获当前页面获取焦点和失去焦点
<html>
<head>
<script type="text/javascript">
window.onfocus = function(){
console.log('test-in');
};
window.onblur = function(){
console.log('test-out');
};

</script>
</head>
<body>

</body>
</html>

按F12 进入console的控制台可以看到

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转载自cuityang.iteye.com/blog/2360771