When you build a big enough site with a big enough software, you’ll eventually discover that CSS presents challenges at level. At Meta, it’s the same as it is, which is why we open-sourced StyleX, a CSS option at level. StyleX combines stable CSS with CSS-in-JS for improved performance. It provides nuclear style of components, deduplicates definitions, and provides a straightforward API for developers.
At businesses like Figma and Snowflake, StyleX has become the norm. It’s the accepted style convention for Facebook, Instagram, WhatsApp, Messenger, and Strands these at Meta.
Meet Melissa, a software engineer at Meta and one of StyleX’s maintainers, on this season of the Meta Tech Podcast. speaks to her about all things StyleX, including its origins, how open source has helped the project grow exponentially, and how it’s like dealing with big companies in the industry as they adopt StyleX.
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