Baseline’s evolution on MDN | MDN Blog
To understand the Baseline better, let’s look at the timeline of the CSS custom properties implementation in core browsers, listed in the order of its first appearance:
Firefox 31: July 22, 2014
Chrome 49: March 2, 2016
Safari 9.1: March 21, 2016
Edge 15: April 5, 2017
According to the Baseline definition, CSS custom properties became “newly available” on April 5, 2017, with the Edge 15 release, and therefore, became a part of “Baseline 2017”.…
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