1. CSS Text Box

    CSS `text-box` (and its longhands `text-box-trim` & `text-box-edge`) provide the ability to trim extra space over/under text glyphs at the start/end of a block to match specific font-provided metrics. This allows for more precise alignment and positioning of text.

  2. editcontext api: characterboundsrangestart

  3. editcontext api: `compositionstart` event

  4. editcontext api: selectionstart

  5. htmltextareaelement api: selectionstart

  6. offlineaudiocontext api: startrendering

  7. offlineaudiocontext api: startrendering: returns a `promise`

  8. svgtextcontentelement api: getstartpositionofchar

  9. svgtextpathelement api: startoffset

  10. textformat api: rangestart

  11. texttrackcue api: starttime

  12. textupdateevent api: selectionstart

  13. textupdateevent api: updaterangestart

  14. xmlhttprequestupload api: `loadstart` event

  15. xmlhttprequest api: `loadstart` event

  16. xrsession api: `selectstart` event

  17. xrsession api: `squeezestart` event

  18. css property: align-content: supported in flex layout: `start` and `end`

  19. css property: align-items: supported in flex layout: `start` and `end`

  20. css property: align-self: supported in flex layout: `start` and `end`

  21. css property: background-position-x: x-start

  22. css property: background-position: x-start

  23. css property: background: x-start

  24. css property: justify-content: supported in flex layout: `start` and `end`

  25. css property: mask-position: x-start

  26. css property: mask: x-start

  27. css property: object-position: x-start

  28. css property: offset-anchor: x-start

  29. css property: offset-position: x-start

  30. css property: offset: x-start

  31. css property: perspective-origin: x-start

  32. css property: position-area: self-x-start

  33. css property: position-area: span-self-x-start

  34. css property: position-area: span-x-start

  35. css property: position-area: x-start

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

  37. css property: position-try-fallbacks: span-self-x-start

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

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

  40. css property: position-try: self-x-start

  41. css property: position-try: span-self-x-start

  42. css property: position-try: span-x-start

  43. css property: position-try: x-start

  44. css property: text-align-last: start

  45. css property: text-align: start

  46. css property: text-anchor: start

  47. css property: text-box-trim: trim-start

  48. css property: text-box: trim-start

  49. css property: text-spacing-trim: trim-start

  50. svg element: textpath: startoffset