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beforeunload Edit page View complete diff View page history	Jul 1, 2015 12:34:39 PM	It doesn't make any sense to use `e \|\| window.event` within `element.addEventListener()` since all browsers that support `addEventListener` do not require `window.event` workaround.

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Jul 1, 2015
12:34:39 PM

It doesn't make any sense to use `e || window.event` within `element.addEventListener()` since all browsers that support `addEventListener` do not require `window.event` workaround.