Custom properties cause late type errors

Miriam Suzanne joins the podcast to unpack the surprisingly deep world of CSS value resolution, the browser program running beneath every website. She explains how cascade and inheritance work together, why CSS custom properties introduce invalid at computed value time errors, and how CSS functions and mixins change the game. Plus: is Sass actually dead, or does it still solve real problems that the browser can't touch?

Links

Website: https://www.miriamsuzanne.com
Mastodon: https://front-end.social/@mia
Bluesky: https://bsky.app/profile/miriam.codes
Github: https://github.com/mirisuzanne
Codepen: https://codepen.io/miriamsuzanne

Resources

Is Sass Dead Yet? CSS Mixins and Functions - Miriam Suzanne - CSS Day 2025: https://www.youtube.com/watch?v=IIvqkkfmPYE
When Variables Cascade with MIRIAM SUZANNE - SmashingConf New York 2025: https://www.youtube.com/watch?v=F-vopd4wMvI

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Chapters

Special Guest: Mia Suzanne.