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.

Array.prototype.findIndex

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

flat & flatMap array methods

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

Array.prototype.includes

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

CSS Filter Effects

Method of applying filter effects using the `filter` property to elements, matching filters available in SVG. Filter functions include blur, brightness, contrast, drop-shadow, grayscale, hue-rotate, invert, opacity, sepia and saturate.

Shared Array Buffer

Type of ArrayBuffer that can be shared across Workers.

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`

css property: offset-path: support for `ray()` function as a value

types: `ray()`

types: `ray()`: `at <position>`

types: `ray()`: `<size>`

javascript built-in: array

javascript built-in: arraybuffer

javascript built-in: array: at

javascript built-in: array: concat

javascript built-in: array: every

javascript built-in: array: fill

javascript built-in: array: filter

javascript built-in: array: flat

javascript built-in: array: from

javascript built-in: array: join

javascript built-in: array: keys

javascript built-in: array: length

javascript built-in: array: map

javascript built-in: array: of

javascript built-in: array: pop

javascript built-in: array: push

javascript built-in: array: shift

javascript built-in: array: slice

javascript built-in: array: some

javascript built-in: array: sort

javascript built-in: array: with

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