Array manipulation, ordering, searching, summarizing, etc.

Work with IANA language tags.

filter in array tree

Array#filter for older browsers.

MongoDB query filtering in JavaScript

Array#filter() with also detecting indexes of filtered values

Filter an array of objects to a specific OS

Filter an array of objects to a specific OS

utilities for primitive JavaScript types

Apply a sequence of filter functions to an object

The Interactive Extensions for JavaScript

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Lazy-evaluating list of files, based on globs or regex patterns

Lightweight utility for input validation and data extraction in Turf.js. Ensures GeoJSON inputs are in the correct format and extracts specific components like coordinates or geometries.

Iterates over the elements in an array, returning an array with only the elements for which the callback returns truthy.

Efficient Binary heap (priority queue, binary tree) data structure for JavaScript / TypeScript. Includes JavaScript methods, Python's heapq module methods, and Java's PriorityQueue methods.

Run an array of functions in parallel

A babel transform for filtering out imports

core-js compat

Parses set-cookie headers into objects