window.opener is null

[lithi...@gmail.com]

I want to receive an object/message from the window that I open to the main window but window.opener is null in the newly opened window. How else do I do it? Using nwjs v0.17.4

nw.Window.open('https://github.com/', {
    'inject_js_end': './script.js'
})

[kailn...@gmail.com]

var childWindow;

nw.Window.open('https://github.com/', { 'inject_js_end': './script.js' }, function (githubWindow) {

                githubWindow.on('loaded', function () {

                    childWindow = githubWindow.window;
                    childWindow.parentWindow = window;

                });

            });

now, in the main window you can access the child window, its variables and functions you can even call them.
In the child window you can access the parent window;