Question

What I’m looking to do is create a new window using window.open and then when the new window opens, I want to check if that window is active throughout?

For example: I have

myNewWindow = window.open(document.getElementById("inputbox").value).focus();

Once this window opens, I want to increment the value of variable increase if myNewWindow loses focus.

I’m doing :

if(myNewWindow.onblur()){
    increment value...
}
setTimeout('myNewWindow.close()',3000); // closing window after 3 seconds. So, I'm really trying to check if the window was in focus for those 3 seconds.

However, the onblur does not seem to work no matter what I try. but, window does close.
Any ideas anyone? I just need to find out if the new opened window was minimized or some out of focus.

Its fairly easy to detect if the window in which you are running your JS is losing focus or not. And the same does not seem to work in my case. For example: JavaScript / jQuery: Test if window has focus

Answer 1

From page1, no you cannot directly set or subscribe to events on page2. However, you can use something like window.postMessage to pass messages between them.