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Hi, I’m Lea and I love making things. Ι design new web technologies implemented in browsers, and tools used by millions of developers. As a W3C TAG member, I review web technology proposals to ensure they benefit the Web. I’ve done HCI research at MIT on democratizing web development, earning me a PhD. I speak, teach, and write, including a bestselling book with O’Reilly, dubbed “Best CSS book”. I often blog about all this – and more!

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Blog

  1. Numbers or Brackets for numeric questions? 11 min 0 comments
  2. Help Design the Inaugural State of HTML Survey! 6 min 0 comments
  3. Going Lean 14 min 0 comments
  4. Rethinking Categorization 7 min 0 comments
  5. 11ty: Index ALL the things! 7 min 0 comments
  6. Migrating Disqus from WP to 11ty 7 min 0 comments
  7. JS private class fields considered harmful 3 min 0 comments
  8. Contrast Ratio has a new home — and this is great news! 2 min 0 comments
  9. Position Statement for the 2022 W3C TAG Election 4 min 0 comments
  10. State of CSS 2022 now open! 3 min 0 comments
  11. On ratings and meters 4 min 0 comments
  12. Help design the State of CSS Survey 2022! 2 min 0 comments
  13. What is the best way to mark up an exclusive button group? 2 min 0 comments
  14. Introducing Rety: live coding, without the stress 4 min 0 comments
  15. Releasing Color.js: A library that takes color seriously 4 min 0 comments
  16. On Yak Shaving and <md-block>, a new HTML element for Markdown 2 min 0 comments
  17. Custom properties with defaults: 3+1 strategies 6 min 0 comments
  18. Inherit ancestor font-size, for fun and profit 9 min 0 comments
  19. Is the current tab active? 6 min 0 comments
  20. 82% of developers get this 3 line CSS quiz wrong 3 min 0 comments
  21. Dark mode in 5 minutes, with inverted lightness variables 9 min 0 comments
  22. Mass function overloading: why and how? 6 min 0 comments
  23. Writable getters 7 min 0 comments
  24. Position Statement for the 2020 W3C TAG Election 7 min 0 comments
  25. The case for Weak Dependencies in JS 8 min 0 comments
  26. Simple pie charts with fallback, today 5 min 0 comments
  27. The -​-var: ; hack to toggle multiple values with one custom property 4 min 0 comments
  28. The failed promise of Web Components 6 min 0 comments
  29. Developer priorities throughout their career 4 min 0 comments
  30. Parsel: A tiny, permissive CSS selector parser 4 min 0 comments

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