We are using data- prefix in our html tags to attach some data to our elements. We can get that data by this.dataset property in Chrome and as we are too lazy to check if our functions work under different browsers/engines(by the way i have to support FF and Chrome only, no safari, no IE), now our app is failing under FF because FF does not know what is “this.dataset”. Is it going to be supported by FF too(our app is not going to be ready for a month or more), or should we re-write our code?
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The patch for dataset support is not going to ship in a Firefox release until at least August. So if you need something in a month, you shouldn’t rely on it.
See https://bugzilla.mozilla.org/show_bug.cgi?id=560112 for details.