1. CSS all property

    A shorthand property for resetting all CSS properties except for `direction` and `unicode-bidi`.

  2. :dir() CSS pseudo-class

    Matches elements based on their directionality. `:dir(ltr)` matches elements which are Left-to-Right. `:dir(rtl)` matches elements which are Right-to-Left.

  3. CSS Logical Properties

    Logical properties and values provide control of layout through logical, rather than physical, direction and dimension mappings. These properties are `writing-mode` relative equivalents of their corresponding physical properties.

  4. CSS overflow property

    Originally a single property for controlling overflowing content in both horizontal & vertical directions, the `overflow` property is now a shorthand for `overflow-x` & `overflow-y`. The latest version of the specification also introduces the `clip` value that blocks programmatic scrolling.

  5. CSS resize property

    Method of allowing an element to be resized by the user, with options to limit to a given direction.

  6. CSS writing-mode property

    Property to define whether lines of text are laid out horizontally or vertically and the direction in which blocks progress.

  7. CSS Flexible Box Layout Module

    Method of positioning elements in horizontal or vertical stacks. Support includes all properties prefixed with `flex`, as well as `display: flex`, `display: inline-flex`, `align-content`, `align-items`, `align-self`, `justify-content` and `order`.

  8. Web Sockets

    Bidirectional communication technology for web apps

  9. WebTransport

    Protocol framework to send and receive data from servers using [HTTP3](/http3). Similar to [WebSockets](/websockets) but with support for multiple streams, unidirectional streams, out-of-order delivery, and reliable as well as unreliable transport.

  10. canvasrenderingcontext2d api: direction

  11. htmlinputelement api: selectiondirection

  12. htmlmarqueeelement api: direction

  13. htmltextareaelement api: selectiondirection

  14. idbcursor api: direction

  15. offscreencanvasrenderingcontext2d api: direction

  16. rtcpeerconnection api: addtransceiver: `init.direction` parameter

  17. rtcrtptransceiver api: currentdirection

  18. rtcrtptransceiver api: currentdirection: `"stopped"` value

  19. rtcrtptransceiver api: direction

  20. rtcrtptransceiver api: direction: `"stopped"` value

  21. selection api: direction

  22. usbendpoint api: direction

  23. webtransportbidirectionalstream api

  24. webtransportbidirectionalstream api: readable

  25. webtransportbidirectionalstream api: readable: returns `webtransportreceivestream` (earlier spec returned `writablestream`)

  26. webtransportbidirectionalstream api: writable

  27. webtransportbidirectionalstream api: writable: returns `webtransportsendstream` (earlier spec returned `writablestream`)

  28. webtransport api: createbidirectionalstream

  29. webtransport api: createbidirectionalstream: `options.sendorder` parameter

  30. webtransport api: createunidirectionalstream

  31. webtransport api: createunidirectionalstream: byob reader support

  32. webtransport api: createunidirectionalstream: `options.sendorder` parameter

  33. webtransport api: incomingbidirectionalstreams

  34. webtransport api: incomingunidirectionalstreams

  35. xrlightestimate api: primarylightdirection

  36. xrray api: direction

  37. css property: animation-direction

  38. css property: animation-direction: `alternate-reverse`

  39. css property: animation-direction: `reverse`

  40. css property: background-repeat: two-value syntax (different values for x & y directions)

  41. css property: box-direction

  42. css property: direction

  43. css property: direction: control direction of vertical range sliders, meters, and progress bars

  44. css property: flex-direction

  45. css property: unicode-bidi

  46. types: `<easing-function>`: `steps()` with `start`, `end` or no direction

  47. types: `<easing-function>`: `steps()` with `start`, `end` or no direction: `jump-` keywords for `steps()`

  48. html element: marquee: direction