1. :default CSS pseudo-class

    The `:default` pseudo-class matches checkboxes and radio buttons which are checked by default, `<option>`s with the `selected` attribute, and the default submit button (if any) of a form.

  2. audioparam api: defaultvalue

  3. document api: defaultview

  4. document api: execcommand: `defaultparagraphseparator` command

  5. eventtarget api: addeventlistener: form with `options` object supported (third parameter can be either options or a `boolean`, for backwards compatibility): `options.passive` parameter defaults to `true` for `touchstart` and `touchmove` events

  6. eventtarget api: addeventlistener: form with `options` object supported (third parameter can be either options or a `boolean`, for backwards compatibility): `options.passive` parameter defaults to `true` for `wheel` and `mousewheel` events

  7. event api: defaultprevented

  8. event api: preventdefault

  9. htmlinputelement api: defaultchecked

  10. htmlinputelement api: defaultvalue

  11. htmlmediaelement api: defaultmuted

  12. htmlmediaelement api: defaultplaybackrate

  13. htmloptionelement api: defaultselected

  14. htmloutputelement api: defaultvalue

  15. htmltextareaelement api: defaultvalue

  16. htmltrackelement api: default

  17. mediacontroller api: defaultplaybackrate

  18. node api: isdefaultnamespace

  19. presentation api: defaultrequest

  20. readablestreamdefaultcontroller api

  21. readablestreamdefaultcontroller api: close

  22. readablestreamdefaultcontroller api: error

  23. readablestreamdefaultreader api

  24. readablestreamdefaultreader api: cancel

  25. readablestreamdefaultreader api: closed

  26. readablestreamdefaultreader api: read

  27. request api: credentials: default value `same-origin`

  28. sanitizer api: `getdefaultconfiguration()` static method

  29. speechsynthesisvoice api: default

  30. trustedtypepolicyfactory api: defaultpolicy

  31. window api: getdefaultcomputedstyle

  32. window api: getdefaultcomputedstyle: pseudo-element support

  33. writablestreamdefaultcontroller api

  34. writablestreamdefaultcontroller api: error

  35. writablestreamdefaultwriter api

  36. writablestreamdefaultwriter api: abort

  37. writablestreamdefaultwriter api: close

  38. writablestreamdefaultwriter api: closed

  39. writablestreamdefaultwriter api: ready

  40. writablestreamdefaultwriter api: write

  41. css property: cursor: default

  42. html element: track: default

  43. headers http header: content-security-policy: default-src

  44. headers http header: referrer-policy: default policy is `strict-origin-when-cross-origin`

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

  46. javascript built-in: date: utc: `monthindex` defaults to 0

  47. javascript function: default parameters

  48. javascript function: default parameters: destructured parameter with default value assignment

  49. javascript function: default parameters: parameters without defaults after default parameters

  50. javascript statement: export: `default` keyword with `export`