Window.open callback returns undefined for new window

[eemi2010]

nw.Window.open('https://github.com', {}, function(new_win) {
console.log(new_win);
});

new_win is randomly undefined. So if you run the code lets say 5 times. You might get undefined 2 times

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[AndryBray]

I can confirm this issue with latest nightly build (2016-01-08) on MacOS

[AndryBray]

@rogerwang I see this problem every time I execute this on latest nwjs 0.13 beta3 (Jan 12)

nw.Window.open('http://www.google.com', {}, function(w) {
   console.log('nw window', w);
});

any news about that?

[thib3113]

same problem with beta4 on windows . new_win is randomly indefined

[berlincount]

same on beta4 and beta5

[berlincount]

oh, I'm using new_win = nw.Window.open(url, options), btw, an expecting the same as I'd get from window.open() in a browser ...

[rogerwang]

Does this happen only with remote sites? It should have been fixed in the nightly build.

[AndryBray]

@rogerwang I had this problem even with local pages. I will test next build ASAP

[AndryBray]

Hello @rogerwang
the bug is still there in latest 0.13

Any workaround for the moment?

[AndryBray]

tested on nwjs 0.14... bug is still there =(

[rogerwang]

It works for me because we have a test case for this scenario: https://github.com/nwjs/nw.js/tree/nw13/test/remoting/open-remote

See test.py for the content of index.html it generates on the fly.

Is it different from yours?

[thib3113]

I have the same problem with the version 0.13.0-rc3sdk , but it's not all time ... maybe one time for 10 tests .

[rogerwang]

@thib3113 could you please upload a sample for the random error? Our test case 'open-remote' never fail so I cannot reproduce it.

[thib3113]

I juste use this :

gui.Window.open('http://www.XXXXX.com/forum/notifications.html', {
      position: 'center',
      width: screen.availWidth,
      height: screen.availHeight,
      show : false,
  },
    function(cWindows){
        cWindows.on('error', function(a,b,c){
            debugger;
        });
});

With devtools open, and some time i see

on is not a function of undefined

(not sure is the exact error message, but it is like the error)

But, i don't know if the problem is : the website, my connection (I use my phone connection, so lot of connection problems), or other ...

[AndryBray]

@rogerwang any news about this issue?
I see I have the param "node-remote" set to my domain inside the package.json.

In your test case you don't have any "node-remote". Maybe try to set it and test again.
The problem is still there even with latest of 0.14.
Thank you

[RohitSharma27]

nw 0.13.0
@rogerwang I can see the same issue as commented by @thib3113 . And it happens in opening a new window and loading local html file in it. The callback in the
Window.open(... , ... , function(win){})
function says "win" is undefined and if I use
win.on('loaded', function(){})
then it sometimes work and sometimes don't by saying "win.on" is not a function of undefined. (Same as reported by @thib3113

[rogerwang]

should be fixed within this build: http://dl.nwjs.io/live-build/05-03-2016/nw14-d154648-1208bce-756e507-24751d8/v0.14.3/

[softoxy]

In 0.14.4 the problem is still present.

[softoxy]

I found the solution in 0.14.4, i am changed the approach:

window.opener.closeSplashscreen();

[AndryBray]

#4844 (comment)

[walton007]

any update? I also meet this issue and don't know how to workaround?
my case is:

1. first index.html open one sub_index.html
2. in the sub_index.html, i open another sub_sub_index.html
   then, sub_sub_index.html is opened. but the Window.open(cb) returns undefined! I just lost control of the new created windows!
   Any one know how to workaround??

[AndryBray]

@walton007 what is your nwjs version? did you try with 0.17?

[tiegeda]

I reproduce it use remote url and set dns to invalid ip. nw.window.open callback a undefined
（when I was trying to deal with timeout， I want to redirect when timeout， but got a undefined）
nwjs 0.14.7

[cyc0der]

same problem for me on winddows
win == undefined
` var gui = require('nw.gui');

		  var win = gui.Window.open ('print.html', {
		  position: 'center',
		  width: 901,
		  height: 127
		  });

		  win.on ('loaded', function(){
			var parameters = {greeting: "Hello World"}
			win.emit("data", parameters);
		  });`

[timraasveld]

For me, the undefined win was caused by loading a not-found HTML file. If you want to know if this is the cause of your problem as well, put about:blank as the first argument, which should always work if your nwjs version is fine:

nw.Window.open('about:blank', {}, function(win) {
  if(win) {
    console.log("win is no longer undefined!");
  }
);

[ghost]

I am having this problem, and it doesn't even work with about:blank...