1. CSS image-set

    Method of letting the browser pick the most appropriate CSS image from a given set.

  2. CSS font-feature-settings

    Method of applying advanced typographic and language-specific font features to supported OpenType fonts.

  3. Efficient Script Yielding: setImmediate()

    Yields control flow without the minimum delays enforced by setTimeout

  4. Srcset and sizes attributes

    The `srcset` and `sizes` attributes on `img` (or `source`) elements allow authors to define various image resources and "hints" that assist a user agent to determine the most appropriate image source to display (e.g. high-resolution displays, small monitors, etc).

  5. dommatrix api: setmatrixvalue

  6. element api: setattribute

  7. element api: setattributenode

  8. element api: setattributenodens

  9. element api: setattributens

  10. element api: setcapture

  11. element api: sethtmlunsafe

  12. element api: setpointercapture

  13. fence api: setreporteventdataforautomaticbeacons

  14. fence api: setreporteventdataforautomaticbeacons: separate `reserved.top_navigation_start` and `reserved.top_navigation_commit` `eventtype` values

  15. formdata api: set

  16. headers api: set

  17. navigator api: setappbadge

  18. range api: setend

  19. range api: setendafter

  20. range api: setendbefore

  21. range api: setstart

  22. range api: setstartafter

  23. range api: setstartbefore

  24. selection api: setbaseandextent

  25. setinterval api

  26. setinterval api: supports parameters for callback

  27. setinterval api: available in workers

  28. settimeout api

  29. settimeout api: supports parameters for callback

  30. settimeout api: available in workers

  31. storage api: setitem

  32. window api: setimmediate

  33. window api: setresizable

  34. headers http header: set-cookie

  35. headers http header: set-cookie: cookie prefixes

  36. headers http header: set-cookie: httponly

  37. headers http header: set-cookie: max-age

  38. headers http header: set-cookie: partitioned

  39. headers http header: set-cookie: samesite: `samesite=lax`

  40. headers http header: set-cookie: samesite: defaults to `lax`

  41. headers http header: set-cookie: samesite: `samesite=none`

  42. headers http header: set-cookie: samesite: secure attribute required if `samesite=none`

  43. headers http header: set-cookie: samesite: url scheme-aware ("schemeful")

  44. headers http header: set-cookie: samesite: `samesite=strict`

  45. headers http header: set-login

  46. svg element: set

  47. svg element: set: fill

  48. svg element: set: href

  49. svg element: set: systemlanguage

  50. svg element: set: to