Debugging CSS for UI Responsiveness

The following is an extract from our book, CSS Master, written by Tiffany Brown. Copies are sold in stores worldwide, or you can buy it in ebook form here.

CSS properties and values that trigger reflows are particularly expensive. They can slow user interface responsiveness―page rendering, animation smoothness, and scroll performance―especially on low-powered devices such as phones and smart TVs.

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Source: Sitepoint