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by ash_gti 3269 days ago
This appears to be browser specific.

I copied his code-pen and used his first example in Safari (just using the `left` css property) and it was still 60 FPS in Safari (per debugging tools). I wonder how much variance there is between browsers on this. (I'm on a Mac 10.12.5 using Safari 10.1.1 (12603.2.4))
2 comments
luke3butler 3269 days ago
There are a lot of jsperf tests like this one https://jsperf.com/translate3d-vs-xy/4

This isn't pure css as it's using JS to set the property, but it should be a good indicator.

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ash_gti 3269 days ago
I'm not an expert in this area, but doesn't setting these properties only take effect in the next layout/paint cycle?

I think you need to call getComputedStyle (https://developer.mozilla.org/en-US/docs/Web/API/Window/getC...) to resolve the new style update outside of the layout/paint cycle.

But I'm not really sure to be honest

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iainmerrick 3269 days ago
All CSS advice around "this causes the creation of a compositing layer" is browser-specific. Chrome and Safari happen to have a particular compositing model but AFAIK there's nothing in the HTML spec that actually requires it.
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