检查弹出窗口是否已打开 [英] Check if popup window is already open

问题描述

如何修改它以便检查弹出窗口是否已打开？

How can I modify this so it checks and if a popup window is already open?

function popUp(URL) {
  day = new Date();
  id = day.getTime();
  eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width=350,height=100');");
}

///////// ////编辑No2

/////////////Edit No2

var options =toolbar = 0，scrollbars = 0，location = 0 ，statusbar = 0，menubar = 0，resizable = 1，width = 350，height = 100;

var popup = window.open（URL，popup，options）;

function popUp（URL）{
day = new Date（）;
id = day.getTime（）;
eval（page+ id += window.open（URL，'+ id +'，'toolbar = 0，scrollbars = 0，location = 0，statusbar = 0，menubar = 0，可调整大小） = 1，宽度= 350，高度= 100' ）;）;
}

我的js电话

My js call

< a id =floating_linkhref =javascript：popUp（'MyPage.html'）>播放器< / a>

推荐答案

我的回答是这个问题链接到这里。

My answer is to this question linked to here.

检查以下代码。

您可以使用 onbeforeunload 进行回电在窗口卸载之前。

You can use onbeforeunload to get a callback before the window unloads.

检查这是否是由于 window.close 执行此操作

To check if this is due to window.close do this

setTimeout(function(){
        if(anc.closed) console.log('closed'); 
        else console.log('refreshed');
  },1000); // to check after the window closed

完整代码

var anc = window.open('https://stackoverflow.com');

var anc.onbeforeunload = function() { // called before closing the window.

  setTimeout(function() {
    if (anc.closed) console.log('closed');
    else console.log('refreshed');
  }, 1000); // to check after the window closed

}

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