javascript在当前窗口关闭前检测窗口是否关闭

在当前窗口关闭前,检测当前窗口是否关闭

<pre name="code"><pre name="code"><HTML><HEAD> <script Language="JavaScript"> window.onbeforeunload=function(event){ alert("222"); //这里IE9会执行,CHROME不会执行 // if(event.clientX>document.body.clientWidth && event.clientY<0||event.altKey){ //如果是刷新,则不提示 RETURN "确定关闭窗口"; // } } var aa ; var intervalVar; function showClose(){ console.log(" wait and val is :"+aa.closed); clearInterval(intervalVar); } function loadform(){ aa=window.open('foo.html', 'windowName',"width=200,height=200,scrollbars=no"); console.log("check close before op and val is :"+aa.closed); //现在窗口未关闭,结果为false aa.close();<span> </span> //调用窗口关闭的方法 console.log("not in wait and val is :"+aa.closed); //此时aa.close正在调用过程中,结果为false intervalVar = setInterval(showClose,100); }; //用循环检测子窗口是否关闭,其实用setTimeout也是可以的,不过值要设得大一些 function unloadform(){ alert("2!"); } </script> </HEAD><BODY OnLoad="loadform()" OnUnload="unloadform()"> </BODY></HTML>

在ie9中,如果刷新文档的话,unloadform和onbeforeunload都会执行,如果是关闭页面的话只会执行onbeforeunload事件

值得注意的是,onunload在关闭页面时不会运行,估计此函数为浏览器内置事件,不能重新定义

在chrome中,如果刷新文档的话,unloadform和onbeforeunload都会执行,关闭页面的话,只会执行onbeforeunload,值得注意的是有注释的那一行一直不会执行.

如果是window.open打开的子窗口的话,可以通过window.closed属性检测是否关闭

<HTML><HEAD> <script Language="JavaScript"> var aa ; var intervalVar; function showClose(){ console.log(" wait and val is :"+aa.closed); clearInterval(intervalVar); } function loadform(){ aa=window.open('foo.html', 'windowName',"width=200,height=200,scrollbars=no"); console.log("check close before op and val is :"+aa.closed); //现在窗口未关闭,结果为false aa.close(); //调用窗口关闭的方法 console.log("not in wait and val is :"+aa.closed); //此时aa.close正在调用过程中,结果为false intervalVar = setInterval(showClose,100); }; //用循环检测子窗口是否关闭,其实用setTimeout也是可以的,不过值要设得大一些 function unloadform(){ alert("2!"); } </script> </HEAD><BODY OnLoad="loadform()" OnUnload="unloadform()"> <a href="test.htm">调用</a> </BODY></HTML>

父窗口关闭时会自动将window.open关闭的代码

<HTML><HEAD> <script Language="JavaScript"> var aa ; var intervalVar; window.onbeforeunload=function(event){ aa.close(); return "hello"; } function loadform(){ aa=window.open('test.htm', 'windowName',"width=200,height=200,scrollbars=no"); }; function unloadform(){ alert("2!"); } </script> </HEAD><BODY OnLoad="loadform()" OnUnload="unloadform()"> <a href="test.htm">调用</a> </BODY></HTML>