Opera `window.onfocus`, `window.onblur` events bug.

[anonan]

anonan last edited by anonan

The link to the video demonstration: https://youtu.be/noJWd6bBkUs

The description

Opera triggers several false window.onclick, window.onblur events when you click on a tab.
Switching tabs via Ctrl+Tab does not fire additional events.

Both Opera and Chrome trigger two onclick event when you open a new tab in background.
It looks like a bug. I think it should be triggered only one time.
Probably the first onfocus is the event that fire immediately after clicking and creating the tab in background.

Chrome also loses a focus when you drag the tab.

If you wanna test this by yourself

To demonstrate it I used the userscript on http://example.com/
Link to the userscript: https://pastebin.com/7Zsj4R7k