Buffers events from a stream until you are ready to handle them.

Allows users to use generators in order to write common functions that can be both sync or async.

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results, with no public domain dependencies

A small polyfill for Object.setprototypeof

Returns true if a string has an extglob.

Safer Node.js Buffer API

The Node.js `util.deprecate()` function with browser support

Fast deep equal

A stream that emits multiple other streams one after another.

Fast (and loose) selective `process.env` replacer using js-tokens instead of an AST

Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

process.nextTick but always with args

Support for representing 64-bit integers in JavaScript

Use node's fs.realpath, but fall back to the JS implementation if the native one fails

Create a stream that emits events from multiple other streams

ES2015 `Object.assign()` ponyfill

YAML 1.2 parser and serializer

Merge multiple streams into one stream in sequence or parallel.

Turn any collection of objects into its own efficient tree or linked list using Symbol