Check If Popup Window Is Already Open

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,

Solution 1:

Use the same id for the window, which is the name of the window, to reuse it if it exists.

http://www.w3schools.com/jsref/met_win_open.asp

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);

To do this with an anchor tag you just set the target

If you set an anchor tag's target target="myopup" it will use that same window if it exists

Solution 2:

My answer is to this question linked to here.

Check the following code.

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

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

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

FULL CODE

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

var anc.onbeforeunload = function() { // called before closing the window.setTimeout(function() {
    if (anc.closed) console.log('closed');
    elseconsole.log('refreshed');
  }, 1000); // to check after the window closed

}