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

deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify

A small polyfill for Object.setprototypeof

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

process.nextTick but always with args

Create a stream that emits events from multiple other streams

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

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

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

Safer Node.js Buffer API

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

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

[](https://travis-ci.org/stefanpenner/get-caller-file) [](https://ci.a

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

Minimal string/DOM templating.

YAML 1.2 parser and serializer

ES2015 `Object.assign()` ponyfill

extend like a boss

A stream that emits multiple other streams one after another.

Merge multiple streams into one stream in sequence or parallel.