How to ensure to know if a user has clicked on cancel on that alert? and Revert the action/API call that I was going to if user had proceeded to leave.
Inside your beforeunload handler, you can add code in a setTimeout—probably even with a timeout of zero. That code will only run if the user allowed the page to stay open.
Yeah, because your code otherwise won't have a chance to run.
I'd probably put a longer delay than zero on it, some browsers might let code execute even if the page is closing. I admit this behavior is a bit undefined.
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How to ensure to know if a user has clicked on cancel on that alert? and Revert the action/API call that I was going to if user had proceeded to leave.
Inside your
beforeunloadhandler, you can add code in asetTimeout—probably even with a timeout of zero. That code will only run if the user allowed the page to stay open.Ok so we are basically making it async?
Yeah, because your code otherwise won't have a chance to run.
I'd probably put a longer delay than zero on it, some browsers might let code execute even if the page is closing. I admit this behavior is a bit undefined.