Cancel onbeforeunload event handler?

Question

I have an onbeforeunload event handler attached to the page which executes every time the page reloads / gets redirected.

window.onbeforeunload = function()          


        

Answer 1

To add:

function f_beforeunload(e) {console.log("do something");}
window.addEventListener("beforeunload", f_beforeunload);

To remove:

window.removeEventListener("beforeunload", f_beforeunload);