1. Array.prototype.find

    The `find()` method returns the value of the first item in the array based on the result of the provided testing function.

  2. Array.prototype.findIndex

    The `findIndex()` method returns the index of the first element in the array that satisfies the provided testing function.

  3. flat & flatMap array methods

    Methods to flatten any sub-arrays found in an array by concatenating their elements.

  4. Array.prototype.includes

    Determines whether or not an array includes the given value, returning a boolean value (unlike `indexOf`).

  5. Shared Array Buffer

    Type of ArrayBuffer that can be shared across Workers.

  6. Typed Arrays

    JavaScript typed arrays provide a mechanism for accessing raw binary data much more efficiently. Includes: `Int8Array`, `Uint8Array`, `Uint8ClampedArray`, `Int16Array`, `Uint16Array`, `Int32Array`, `Uint32Array`, `Float32Array` & `Float64Array`

  7. pushmessagedata api: arraybuffer

  8. request api: arraybuffer

  9. response api: arraybuffer

  10. javascript built-in: array

  11. javascript built-in: arraybuffer

  12. javascript built-in: array: @@iterator

  13. javascript built-in: array: @@species

  14. javascript built-in: array: at

  15. javascript built-in: array: concat

  16. javascript built-in: array: copywithin

  17. javascript built-in: array: entries

  18. javascript built-in: array: every

  19. javascript built-in: array: fill

  20. javascript built-in: array: filter

  21. javascript built-in: array: findlast

  22. javascript built-in: array: flat

  23. javascript built-in: array: flatmap

  24. javascript built-in: array: foreach

  25. javascript built-in: array: from

  26. javascript built-in: array: fromasync

  27. javascript built-in: array: indexof

  28. javascript built-in: array: join

  29. javascript built-in: array: keys

  30. javascript built-in: array: length

  31. javascript built-in: array: map

  32. javascript built-in: array: of

  33. javascript built-in: array: pop

  34. javascript built-in: array: push

  35. javascript built-in: array: reduce

  36. javascript built-in: array: reduceright

  37. javascript built-in: array: reverse

  38. javascript built-in: array: shift

  39. javascript built-in: array: slice

  40. javascript built-in: array: some

  41. javascript built-in: array: sort

  42. javascript built-in: array: splice

  43. javascript built-in: array: toreversed

  44. javascript built-in: array: tosorted

  45. javascript built-in: array: tospliced

  46. javascript built-in: array: tostring

  47. javascript built-in: array: unshift

  48. javascript built-in: array: values

  49. javascript built-in: array: with

  50. grammar: array literals (`[1, 2, 3]`)