Add WebKit CSS variables post

Author: twilco

_posts/2021-06-04-improving-css-variables-in-webkit.markdown

@@ -0,0 +1,17 @@
+---
+layout: post
+title:  "Sometimes, a billion laughs aren't so funny — improving CSS variables in WebKit"
+categories: posts
+description: A detailed account of bug fixes I made in WebKit's CSS variables implementation.
+---
+
+Last year, I embarked on a mini-crusade to fix as many bugs in WebKit's CSS variables implementation as I could
+find. While I did a fair amount of this work in my personal time, my employer, [Widen](https://www.widen.com/), was
+kind enough to give me a few days off to work on this too.
+
+I posted a write-up on this work for my company blog. This post is a brief and approachable view into the world of
+browser development — you can see what the code looks like in the form of diffs, how testing works (also in the diffs),
+and the code review process. Check it out!
+
+[https://engineering.widen.com/blog/Improving-CSS-Variables-in-WebKit](https://engineering.widen.com/blog/Improving-CSS-Variables-in-WebKit)
+