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Merge pull request #1581 from JTBrinkmann/next

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suggest alternative to animating `box-shadow`
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Leo Horie 2017-01-31 21:04:59 -05:00 • committed by GitHub
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docs/animation.md
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@ -102,4 +102,4 @@ Note that the `onbeforeremove` hook only fires on the element that loses its `pa
When creating animations, it's recommended that you only use the `opacity` and `transform` CSS rules, since these can be hardware-accelerated by modern browsers and yield better performance than animating `top`, `left`, `width`, and `height`.
It's also recommended that you avoid the `box-shadow` rule and selectors like `:nth-child`, since these are also resource intensive options. Other things that can be expensive include large or dynamically scaled images and overlapping elements with different `position` values (e.g. an absolute postioned element over a fixed element).
It's also recommended that you avoid the `box-shadow` rule and selectors like `:nth-child`, since these are also resource intensive options. If you want to animate a `box-shadow`, consider [putting the `box-shadow` rule on a pseudo element, and animate that element's opacity instead](http://tobiasahlin.com/blog/how-to-animate-box-shadow/). Other things that can be expensive include large or dynamically scaled images and overlapping elements with different `position` values (e.g. an absolute postioned element over a fixed element).