1. CSS font-display

    `@font-face` descriptor `font-display` that allows control over how a downloadable font renders before it is fully loaded.

  2. csscounterstylerule api: fallback

  3. cssvariablereferencevalue api: fallback

  4. css at-rule: `@counter-style`: fallback

  5. css property: position-try-fallbacks

  6. css property: position-try-fallbacks: block-end

  7. css property: position-try-fallbacks: block-start

  8. css property: position-try-fallbacks: bottom

  9. css property: position-try-fallbacks: center

  10. css property: position-try-fallbacks: end

  11. css property: position-try-fallbacks: flip-block

  12. css property: position-try-fallbacks: flip-inline

  13. css property: position-try-fallbacks: flip-start

  14. css property: position-try-fallbacks: inline-end

  15. css property: position-try-fallbacks: inline-start

  16. css property: position-try-fallbacks: left

  17. css property: position-try-fallbacks: none

  18. css property: position-try-fallbacks: right

  19. css property: position-try-fallbacks: self-block-end

  20. css property: position-try-fallbacks: self-end

  21. css property: position-try-fallbacks: self-inline-end

  22. css property: position-try-fallbacks: self-start

  23. css property: position-try-fallbacks: span-all

  24. css property: position-try-fallbacks: span-block-end

  25. css property: position-try-fallbacks: span-bottom

  26. css property: position-try-fallbacks: span-end

  27. css property: position-try-fallbacks: span-inline-end

  28. css property: position-try-fallbacks: span-left

  29. css property: position-try-fallbacks: span-right

  30. css property: position-try-fallbacks: span-self-end

  31. css property: position-try-fallbacks: span-self-start

  32. css property: position-try-fallbacks: span-start

  33. css property: position-try-fallbacks: span-top

  34. css property: position-try-fallbacks: span-x-end

  35. css property: position-try-fallbacks: span-x-self-end

  36. css property: position-try-fallbacks: span-x-start

  37. css property: position-try-fallbacks: span-y-end

  38. css property: position-try-fallbacks: span-y-self-end

  39. css property: position-try-fallbacks: span-y-start

  40. css property: position-try-fallbacks: start

  41. css property: position-try-fallbacks: top

  42. css property: position-try-fallbacks: x-end

  43. css property: position-try-fallbacks: x-self-end

  44. css property: position-try-fallbacks: x-self-start

  45. css property: position-try-fallbacks: x-start

  46. css property: position-try-fallbacks: y-end

  47. css property: position-try-fallbacks: y-self-end

  48. css property: position-try-fallbacks: y-self-start

  49. css property: position-try-fallbacks: y-start

  50. types: `attr()`: <fallback>