`Array.prototype.filter()`

Creates a new array with all elements that pass the test in the callback.

Syntax

arr.filter(callback, thisArg)

Name	Type	Required	Description
`callback`	`Function`	Yes	Predicate called for each element with (element, index, array). Return truthy to keep the element.
`thisArg`	`any`	No	Value to use as `this` when executing the callback.

Array — A new array with the elements that passed the test; empty if none pass.

const nums = [1, 2, 3, 4, 5];
console.log(nums.filter(n => n % 2 === 0));

Output

[ 2, 4 ]

const words = ['a', '', 'b', null];
console.log(words.filter(Boolean));

Output

[ 'a', 'b' ]

Does not mutate the original array. Skips empty slots in sparse arrays. Returns a new array; to find a single element use `find` instead.