An Object.keys replacement, in case Object.keys is not available. From https://github.com/es-shims/es5-shim

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

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

Normalize slashes in a file path to be posix/unix-like forward slashes. Also condenses repeat slashes to a single slash and removes and trailing slashes, unless disabled.

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

Fast deep equal

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

Safer Node.js Buffer API

YAML 1.2 parser and serializer

ES2015 `Object.assign()` ponyfill

extend like a boss

Merge multiple streams into one stream in sequence or parallel.

Require module from string

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

process.nextTick but always with args

Create a stream that emits events from multiple other streams

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

An implementation of WHATWG AbortController interface.

A cross browser microtask library

Escape string for use in HTML