JSPM

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Composite utilities (immutability, fp helpers)

Handlebars + Helpers = Fumanchu

More than 150 Handlebars helpers in 17 categories. Works in browsers and in Node.js.

Essential Handlebars helpers in TypeScript. A modernized collection of 8 core helper categories with TypeScript support and ESM compatibility.

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Usefull array helpers.

Usefull array helpers.

Array assertion helpers for the Chai assertion library

Essential JavaScript helpers

Genetic programming helpers & strategies (tree based & multi-expression programming)

Minimal async jobs utility library, with streams support

More than 130 Handlebars helpers in ~20 categories.

Collection of common helpers and utils for both JavaScript and NodeJS with TypeScript support

A handy utils package with time, random, string helpers, etc...

A collection of helpers functions for working with arrays

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Functional tree editing, manipulation & navigation

Collection of utility functions and helpers, designed to speed up development across SalesPark projects. Includes common helpers, reusable patterns, and extended functions.

Get the first fulfilled promise that satisfies the provided testing function

MAM Helpers

Get the first path that exists on disk of multiple paths

Get the native type of a value.

Array#isArray for older browsers

Determines if an object can be used as an array

Tiny queue data structure

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

User-friendly glob matching

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

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

Run an array of functions in parallel

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

Create an array of unique values, in order, from the input arrays

List of binary file extensions

Returns true if a value is a plain object, array or function.

Flatten nested arrays

Robustly get the byte length of a Typed Array

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

Is this value a JS ArrayBuffer?

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Robustly get the byte offset of a Typed Array

Array and object immutable helpers inspired by lodash

ES spec-compliant shim for ArrayBuffer.prototype.slice

Is this value a JS SharedArrayBuffer?

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

A list of SPDX license identifiers

A simple list of possible Typed Array names.

extend like a boss

Robustly get the length of a Typed Array

Convert a value to an array

Simply swizzle your arguments

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

Detect whether or not an object is a Typed Array

Array manipulation, ordering, searching, summarizing, etc.

An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

TypedArray polyfill for old browsers

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Push an array of items into an array, while being robust against prototype modification

Creates a shallow clone of any JavaScript value.

An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.

An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.

Parse postgres array columns

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.

Remove duplicate values from an array. Fastest ES5 implementation.

a few common utility template tags for ES2015

A static list of the Node.js builtin modules from the latest Node.js version

Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.

Many javascript helpers

Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.

Sort the keys of an object

Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.

Helprjs is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects

Visit a method over the items in an object, or map visit over the objects in an array.

Create an array by repeating the given value n times.

Recursively flatten an array or arrays.

Map `visit` over an array of objects.

Utils for working with JavaScript classes and prototype methods.

Create an array without duplicates

Iterator abstraction based on ES6 specification

Get a compare function for array to sort

Check if a string matches the name of a Node.js builtin module

Turn anything into an array

Guarantees an array back

Isomorphic, functional type-checking for Javascript

No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.

Create an array with values that are present in the first input array but not additional ones

List of text file extensions

ES2015 `Array#findIndex()` ponyfill

Join paths and globs.

An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.

Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.

Array methods for ES6 Iterators

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

Like an array, but rounder.

Removes duplicates from a sorted array in place

Get the longest item in an array.

Loop over each item in an array and call the given function on every element.

Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Check if two arrays are equal

A simple and composable way to validate data in JavaScript (and TypeScript).

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Microsoft sucks

Return true if a value is a valid glob pattern or patterns.

Concatenate a readable stream's data into a single array

ES spec-compliant shim for TypedArray.prototype.slice

Iterate any iterable JS value. Works robustly in all environments, all versions.

List of Markdown file extensions

An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.

An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.

Find the greatest satisfied semver range from an array of ranges.

Run an array of functions in series

A collection of mostly functional programming helpers

Validates if a value is an array.

Isomorphic map-reduce function to flatten an array into the supplied array

Array#filter for older browsers.

Get the last or last n elements in an array.

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

Run promise-returning & async functions in series, each passing its result to the next

An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.

Run an array of functions in parallel, but limit the number of tasks executing at the same time

Validates if a value is an integer array.

Get all but the last element or last n elements of an array.

A ponyfill for the ES 2015 (ES6) `Array.from()`.

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

An optionally-asynchronous forEach with an interesting interface.

Computes the least common multiple (lcm).

Fast and powerful array sorting. Sort an array of objects by one or more properties. Any number of nested properties or custom comparison functions may be used.

make a shallow copy of an object or array

Faster, node.js focused alternative to JavaScript's native array map.

filter in array tree

`Array#forEach()` but it’s possible to define where to move to next

Treat multiple buffers as one

Sort array elements in descending order.

Sort the keys in an object.

Sort array elements in ascending order.

finds an item in an array matching a predicate function, and returns its index

`[].map(f)` for older browsers

ES6 Array.find ponyfill. Return the first array element which satisfies a testing function.

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Sorts any JavaScript array in a predictable way (deep equal arrays are always sorted in the same order)

Make any value an array. No dependencies.

Multidimensional Arrays

A faster Node.js alternative to Array.prototype.slice.call(arguments)

Watch an object or array for changes

Microsoft sucks

`[].reduce()` for old browsers

Generates an array of consecutive integers starting at 0

Make array iteration easy when using async/await and Promises

Check whether a value is "empty".

common javascript utils that can be required selectively that assume es5+

Find the first element in an array that passes a callback test. Equivalent to underscore.find()

Safely push each item of an array to a stream

Test if a value is an array.

Return a function which tests if every element in an array passes a test condition.

Test if a value is a Float64Array.

Float32Array.

Sort an array on an object property

Test if a value is a Uint32Array.

A simple and composable way to validate data in JavaScript (and TypeScript).

Reuse typed arrays

Float64Array.

A tiny, faster alternative to native Array.prototype.every

Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER.

Return a data type from a string representing the type

Maximum unsigned 32-bit integer.

Uint8Array.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Test if a value is a Float32Array.

Packs an array-of-arrays into a single ndarray

Uint32Array.

Uint16Array.

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

Find [nd-]array min/max values

Rotate all items in an array

Rearrange array elements by index array

creates a new array with given range

List of getter/setter properties for JavaScript types

Normalize array (possibly n-dimensional) to zero mean and unit variance

Simple iterator for flat and multi section lists

Move an array item to a different position

flattens nested vertex data into a typed array

Convert Buffer to ArrayBuffer

Deep copy objects and arrays

List of properties for JavaScript objects

List of JavaScript types

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Returns an array containing the initial elements which both input arrays have in common

The swiss army knife for binary data in JavaScript.

Makes easy to convert JSON to CSV

Common typescript ready prototypes available in both CommonJS and ECMAScript

Comma delimit an array for human readability, the Oxford comma is optional.

Rotate an array by a given number of steps

Compare your item to items in an array and get the closest one.

Array / Arraylike utilities

Chai plugin for JSON Schema v4

Isomorphic, load-anywhere function to sort an array by scalar, deep or computed values in any standard or custom order

Creates a real Array from almost anything.

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

A fast implementation of a fisher-yates shuffle that does not mutate the source array.

Merge two lists, trying to preserve the order of both

Composite utilities (immutability, fp helpers)

Extensible deep value equivalence checking for any data types

Return true if the given number is even.

Wrapper for [braces] to enable brace expansion for arrays of patterns.

Returns a copy of an object, sorted deeply by its keys, without mangling any arrays inside of it

Get unique values of an array. Really, like deeply unique.

An ES5 spec-compliant `Array.prototype.every` shim/polyfill/replacement that works as far down as ES3.

high-performance, zero-dependency circular reference check for objects (or arrays)

Recursively iterates over arrays and objects

Give eachr an item to iterate (array, object or map) and an iterator, then in return eachr gives iterator the value and key of each item, and will stop if the iterator returned false.

Computes the L2 norm (Euclidean norm) of an array of values.

Returns true if the given is falsey (according to JavaScript) or matches a 'falsey' keyword.

An RxJS map operator that takes an observable of arrays as input and emits arrays where each element represents emissions from the projected observable.

Flatten a nested array.

List of common default router IP addresses

Module for working with CIDR (v4, v6)

Lazily initialized properties for objects

Adds array support to node-glob, sync and async. Also supports tilde expansion (user home) and resolving to global npm modules.

🔧 Fast, modern, and practical utility library for FP in TypeScript.

A utility function to index arrays by any criteria

Reduce an array to unique values, optionally into a separate array.

Sort string index ranges

Turn an array into a list of comma-separated values, appropriate for use in an English sentence.

Object -> [[key0, value0], [key1, value1]...]

recursive object extending & overriding

Pipe an Array through Node.js streams

Asynchronous iterator function for parallel processing.

Run an array of functions in series, each passing its results to the next function (waterfall)

Join all elements of an array and create a human-readable string

Parse dotenv files for Boolean, Array, and Number variable types, built for CrocodileJS

Check if the given value is an Array

Promised First-In-First-Out buffer. Await on push to be told when a value is consumed and await on shift for a value to consume when the buffer is empty.

Fast intersection of multiple arrays

Randomize the order of the elements in a given array.

Returns an array filled with the specified input

Async array reduce. Asynchronously applies a function against an accumulator and each element in an array (from left to right, in series) to reduce it to a single value.

Like lodash's _.defaultsDeep, but with array preservation

Read, write or test a data structure's nested property via a string like 'my.nested.property'. It works through arrays and objects.'

Helpers used in react projects

An ES spec-compliant `Array.prototype.forEach` shim/polyfill/replacement that works as far down as ES3.