1. srcdoc attribute for iframes

    Override the content specified in the `src` attribute (if present) with HTML content within the attribute.

  2. 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).

  3. cssfontfacedescriptors api: src

  4. event api: srcelement

  5. htmlembedelement api: src

  6. htmlframeelement api: src

  7. htmliframeelement api: src

  8. htmliframeelement api: srcdoc

  9. htmliframeelement api: srcdoc: requires `trustedhtml` instance when trusted types are enforced

  10. htmlimageelement api: src

  11. htmlimageelement api: srcset

  12. htmlinputelement api: src

  13. htmlmediaelement api: src

  14. htmlmediaelement api: srcobject

  15. htmlscriptelement api: src

  16. htmlscriptelement api: src: requires `trustedscripturl` instance when trusted types are enforced

  17. htmlsourceelement api: src

  18. htmlsourceelement api: srcset

  19. htmltrackelement api: src

  20. htmltrackelement api: srclang

  21. notrestoredreasons api: src

  22. speechgrammar api: src

  23. webgl2renderingcontext api: bufferdata: `srcdata` parameter accepts `sharedarraybuffer` type

  24. webgl2renderingcontext api: buffersubdata: `srcdata` parameter accepts `sharedarraybuffer` type

  25. webgl2renderingcontext api: teximage3d: `srcdata` parameter accepts `sharedarraybuffer` type

  26. webgl2renderingcontext api: texsubimage3d: `srcdata` parameter accepts `sharedarraybuffer` type

  27. css at-rule: `@font-face`: src

  28. css at-rule: `@font-face`: src: drop invalid item (not src string)

  29. css at-rule: `@font-face`: src: `format(keyword)`

  30. css at-rule: `@font-face`: src: `format('*-variations')`

  31. css at-rule: `@font-face`: src: `tech(keyword)`

  32. html element: audio: src

  33. html element: embed: src

  34. html element: frame: src

  35. html element: iframe: src

  36. html element: iframe: srcdoc

  37. html element: img: src

  38. html element: input: src

  39. html element: model: src

  40. html element: script: src

  41. html element: source: src

  42. html element: source: srcset

  43. html element: track: src

  44. html element: track: srclang

  45. html element: video: src

  46. headers http header: content-security-policy: child-src

  47. headers http header: content-security-policy: font-src

  48. headers http header: content-security-policy: frame-src

  49. headers http header: content-security-policy: img-src

  50. webapp: serviceworker: src