1. CSS background-repeat round and space

    Allows CSS background images to be repeated without clipping.

  2. CSS3 Border images

    Method of using images for borders

  3. CSS Conical Gradients

    Method of defining a conical or repeating conical color gradient as a CSS image.

  4. CSS Repeating Gradients

    Method of defining a repeating linear or radial color gradient as a CSS image.

  5. ECMAScript 2015 (ES6)

    Support for the ECMAScript 2015 specification. Features include Promises, Modules, Classes, Template Literals, Arrow Functions, Let and Const, Default Parameters, Generators, Destructuring Assignment, Rest & Spread, Map/Set & WeakMap/WeakSet and many more.

  6. Server-sent events

    Method of continuously sending data from a server to the browser, rather than repeatedly requesting it (EventSource interface, used to fall under HTML5)

  7. String.prototype.padStart(), String.prototype.padEnd()

    The `padStart()` and `padEnd()` methods pad the current string with a given string (eventually repeated) so that the resulting string reaches a given length. The pad is applied from the start (left) of the current string for `padStart()`, and applied from the end (right) of the current string for `padEnd()`.

  8. keyboardevent api: repeat

  9. svganimationelement api: `repeatevent` event

  10. css property: -webkit-mask-box-image-repeat

  11. css property: -webkit-mask-repeat-x

  12. css property: -webkit-mask-repeat-y

  13. css property: background-repeat

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

  15. css property: background-repeat: multiple backgrounds

  16. css property: background-repeat: no-repeat

  17. css property: background-repeat: repeat

  18. css property: background-repeat: repeat-x

  19. css property: background-repeat: repeat-y

  20. css property: background-repeat: round

  21. css property: background-repeat: space

  22. css property: border-image-repeat

  23. css property: border-image-repeat: repeat

  24. css property: border-image-repeat: round

  25. css property: border-image-repeat: space

  26. css property: border-image-repeat: stretch

  27. css property: grid-template-columns: `repeat()`

  28. css property: grid-template-rows: `repeat()`

  29. css property: mask-border-repeat

  30. css property: mask-repeat

  31. types: `<image>`: `<gradient>`: `repeating-conic-gradient()`

  32. types: `<image>`: `<gradient>`: `repeating-conic-gradient()`: hue interpolation method

  33. types: `<image>`: `<gradient>`: `repeating-conic-gradient()`: interpolation color space

  34. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`

  35. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: double-position color stops

  36. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: hue interpolation method

  37. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: interpolation color space

  38. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: interpolation hints / gradient midpoints

  39. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: `to` keyword

  40. types: `<image>`: `<gradient>`: `repeating-linear-gradient()`: unitless `0` for <angle>

  41. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`

  42. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: `at` syntax

  43. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: double-position color stops

  44. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: hue interpolation method

  45. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: interpolation color space

  46. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: interpolation hints / gradient midpoints

  47. javascript built-in: string: repeat

  48. svg element: animate: repeatcount