addEventListener not working with onbeforeunload
addeventlistener, events, google-chrome, javascript, onbeforeunload
Solution
Remove the `on` from `onbeforeunload`.
Also, be aware that `addEventListener` will not work in the older IE's and possibly other browsers. If you want consistent event binding use a library.
Problem
``` window.addEventListener("onbeforeunload",function() {return "are you sure?"}); ``` ^ This does not seem to work... at all... the page will simply close without displaying the confirmation box... I realize that... ``` window.onbeforeunload = function() {return "are you sure?"} ``` Will work, but I want to add to the functionality (e.g. add many event listeners to the "onbeforeunload" function) not rewrite the function completely!