jest-mock

**Note:** More details on user side API can be found in [Jest documentation](https://jestjs.io/docs/mock-function-api).

lines-and-columns

Maps lines and columns to character offsets and back.

type-detect

Improved typeof detection for node.js and the browser.

fresh

HTTP response freshness testing

jsonwebtoken

JSON Web Token implementation (symmetric and asymmetric)

less

Leaner CSS

methods

HTTP methods that node supports

which-typed-array

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

iconv-lite

Convert character encodings in pure javascript.

node-gyp-build

Build tool and bindings loader for node-gyp that supports prebuilds

jsonpath-plus

A JS implementation of JSONPath with some additional operators

gulp-plumber

Prevent pipe breaking caused by errors from gulp plugins

archiver

a streaming interface for archive generation

type-is

Infer the content-type of a request.

worker-farm

Distribute processing tasks to child processes with an über-simple API and baked-in durability & custom concurrency options.

@babel/helper-module-imports

Babel helper functions for inserting module loads

prettier-linter-helpers

Utilities to help expose prettier output in linting tools

jasmine

CLI for Jasmine, a simple JavaScript testing framework for browsers and Node

cache-manager

Cache module for Node.js

slice-ansi

Slice a string with ANSI escape codes

@babel/plugin-syntax-import-meta

Allow parsing of import.meta

web-vitals

Easily measure performance metrics in JavaScript

es-abstract

ECMAScript spec abstract operations.

binary-extensions

List of binary file extensions

msgpack-lite

Fast Pure JavaScript MessagePack Encoder and Decoder

diff-sequences

Compare items in two sequences to find a longest common subsequence

unzipper

Unzip cross-platform streaming API

react-refresh

React is a JavaScript library for building user interfaces.

webpack-merge

Variant of merge that's useful for webpack configuration

err-code

Create an error with a code

psl

Domain name parser based on the Public Suffix List

object-hash

Generate hashes from javascript objects in node and the browser.

@emotion/styled

styled API for emotion

regexp.prototype.flags

ES6 spec-compliant RegExp.prototype.flags shim.

content-disposition

Create and parse Content-Disposition header

estree-walker

Traverse an ESTree-compliant AST

xpath

DOM 3 XPath implemention and helper for node.js and the web

encodeurl

Encode a URL to a percent-encoded form, excluding already-encoded sequences

@humanwhocodes/config-array

Glob-based configuration matching.

vary

Manipulate the HTTP Vary header