编程

Js判断页面是关闭还是刷新

  1. 根据页面关闭时的事件判断
    https://blog.csdn.net/u010175124/article/details/9092899
    页面加载时只执行onload
    页面关闭时只执行onunload
    页面刷新时先执行onbeforeunload，然后onunload，最后onload
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<html> 
<head> 
<title>判断页面是关闭还是刷新</title> 
</head> 
 
<body onunload="fclose();" onload="fload();" onbeforeunload="bfunload();"> 
<script language="javascript"> 
var s = "test"; 
function fclose() 
{ 
if(s=="no") 
alert(’unload me!=’+s+’这是刷新页面！’); 
else 
alert(’这是关闭页面’); 
} 
 
function fload() 
{ 
alert("load me!="+s); 
} 
 
function bfunload() 
{ 
s = "no"; 
} 
</script> 
</body> 
</html>

  1. 根据 performance.navigation.type判断
    https://www.zhihu.com/question/29036668
    0表示从链接进去，1表示刷新

  2. 根据window.name判断
    https://www.zhihu.com/question/29036668

    type
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          window.onload = function() {
             if (window.name == "") { // 直接进来才是空的
               alert('直接进来');
             } 
             window.name = "test"; // 刷新当前页面，window.name并不会销毁
          };
    </script>
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