问题
is there some way of detecting using javascript that a user has switched to a different tab in the same browser window.
Additionally is there a way to detect a user has switched to a different window than the browser?
thank you
回答1:
Trap the window.onblur event.
It's raised whenever the current window (or tab) loses focus.
回答2:
Most probably there is no standards javascript for this. Some browsers might support it but normally there is only a window.onblur event to find out the user has gone away from the current window.
回答3:
The Page Visibility API was designed to do this. Have a read at this URL:
https://developer.mozilla.org/en-US/docs/Web/Guide/User_experience/Using_the_Page_Visibility_API
来源：https://stackoverflow.com/questions/13989737/detect-change-of-browser-tabs-with-javascript