1. Canvas (basic support)

    Method of generating fast, dynamic graphics using JavaScript.

  2. contenteditable attribute (basic support)

    Method of making any HTML element editable.

  3. CSS Feature Queries

    CSS Feature Queries allow authors to condition rules based on whether particular property declarations are supported in CSS using the @supports at rule.

  4. CSS.supports() API

    The CSS.supports() static methods returns a Boolean value indicating if the browser supports a given CSS feature, or not.

  5. SVG (basic support)

    Method of displaying basic Vector Graphics features using the embed or object elements. Refers to the SVG 1.1 spec.

  6. TTF/OTF - TrueType and OpenType font support

    Support for the TrueType (.ttf) and OpenType (.otf) outline font formats in @font-face.

  7. css api: supports

  8. customelementregistry api: customized built-in element support

  9. domtokenlist api: supports

  10. eventsource api: `eventsource()` constructor: cors support (`withcredentials`)

  11. fetch api: support for blob: and data:

  12. htmlscriptelement api: supports

  13. mediadevices api: `getdisplaymedia()`: audio capture support

  14. performanceobserver api: supportedentrytypes

  15. pushmanager api: supportedcontentencodings

  16. setinterval api: supports parameters for callback

  17. settimeout api: supports parameters for callback

  18. url api: createobjecturl: support for `mediastream` objects

  19. websocket api: supports protocol as specified by rfc 6455

  20. window api: getcomputedstyle: pseudo-element support

  21. window api: getdefaultcomputedstyle: pseudo-element support

  22. css property: display: list-item: supported on `<legend>`

  23. css property: font: support for `font-stretch` values in shorthand

  24. css property: offset-path: supports the `path()` function as a value

  25. css property: offset-path: supports the `ray()` function as a value

  26. css property: resize: support on block level, replaced, table cell, or inline block elements

  27. css property: resize: support for flow-relative values `block` and `inline`

  28. css property: transform-origin: support in svg

  29. css property: white-space: support in svg

  30. css property: white-space: support on `<textarea>`

  31. css selector: `::after`: animation and transition support

  32. css selector: `::before`: animation and transition support

  33. css selector: `::marker`: animation and transition support

  34. html element: sup

  35. html attribute: title: multi-line support

  36. headers http header: content-security-policy: worker support

  37. javascript built-in: intl: collator: supportedlocalesof

  38. javascript built-in: intl: datetimeformat: supportedlocalesof

  39. javascript built-in: intl: displaynames: supportedlocalesof

  40. javascript built-in: intl: listformat: supportedlocalesof

  41. javascript built-in: intl: numberformat: supportedlocalesof

  42. javascript built-in: intl: pluralrules: supportedlocalesof

  43. javascript built-in: intl: relativetimeformat: supportedlocalesof

  44. javascript built-in: intl: segmenter: supportedlocalesof

  45. javascript built-in: intl: supportedvaluesof

  46. javascript built-in: json: javascript is a superset of json

  47. javascript built-in: string: sup

  48. javascript operator: super

  49. attributes: style: class: animation support

  50. emoji support