Everything is terrible (but more so inside a keypress event handler)
Everything is terrible (but more so inside a keypress event handler) Happy new years. We got really, really close to being able to ship window.event, but had to back that out from shipping to Firefox 65 release in Bug 1520756 (like we had to do in 63). Back in 2014’s classic post “Why FF says that window.event is undefined? (call function with added event listener)*” I mentioned the global event t
How not to feature detect
Bug 1331638 is a good example of why feature detection is important, but also a good reminder to test in enviroments where the feature totally doesn’t exist. A website (Twitter, in this example) tries to do the right thing and check for support before throwing notifications at you: this.isSupported = function() { var a = "PushManager" in window, b = this.getNotificationPermission() !== "denied", c
🙅 @media (-webkit-transform-3d)
@media (-webkit-transform-3d) is a funny thing that exists on the web. It’s like, a media query feature in the form of a prefixed CSS property, which should tell you if your (once upon a time probably Safari-only) browser supports 3D transforms, invented back in the day before we had @supports. (According to Apple docs it first appeared in Safari 4, along side the other -webkit-transition and -web
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