1. dataset & data-* attributes

    Method of applying and accessing custom data to elements.

  2. Attributes for form submission

    Attributes for form submission that may be specified on submit buttons. The attributes are: `formaction`, `formenctype`, `formmethod`, `formnovalidate`, and `formtarget`

  3. 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).

  4. canvasrenderingcontext2d api: getcontextattributes

  5. element api: attributes

  6. element api: hasattributes

  7. gpusupportedlimits api: maxvertexattributes

  8. htmlelement api: attributestylemap

  9. mathmlelement api: attributestylemap

  10. svgelement api: attributestylemap

  11. webgl2renderingcontext api: getcontextattributes

  12. webglrenderingcontext api: getcontextattributes

  13. html element: img: aspect ratio computed from `width` and `height` attributes

  14. html element: video: aspect ratio computed from `width` and `height` attributes

  15. html attribute: `data-*` attributes

  16. html attribute: dir

  17. html attribute: id

  18. html attribute: is

  19. html attribute: lang

  20. html attribute: part

  21. html attribute: slot

  22. javascript statement: import: import attributes with `assert` syntax (formerly import assertions)

  23. javascript statement: import: import attributes with `assert` syntax (formerly import assertions): `assert {type: 'json'}`

  24. javascript statement: import: import attributes (`with` syntax)

  25. javascript statement: import: import attributes (`with` syntax): `with {type: 'json'}`

  26. global_attributes: class

  27. global_attributes: class: animation support

  28. global_attributes: color-interpolation

  29. global_attributes: color-interpolation: lineargradient

  30. global_attributes: color-interpolation: srgb

  31. global_attributes: data

  32. global_attributes: fill

  33. global_attributes: fill-rule

  34. global_attributes: fill: `context-fill`

  35. global_attributes: font-size-adjust

  36. global_attributes: href

  37. global_attributes: id

  38. global_attributes: letter-spacing

  39. global_attributes: paint-order

  40. global_attributes: requiredextensions

  41. global_attributes: requiredextensions: recognizes mathml namespace

  42. global_attributes: stroke

  43. global_attributes: stroke: `context-stroke`

  44. global_attributes: style

  45. global_attributes: tabindex

  46. global_attributes: textlength

  47. global_attributes: transform-origin

  48. global_attributes: vector-effect

  49. global_attributes: word-spacing

  50. global_attributes: xml:space