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

Safer Node.js Buffer API

Returns true if a string has an extglob.

A small polyfill for Object.setprototypeof

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

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

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

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.

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

ES2015 `Object.assign()` ponyfill

YAML 1.2 parser and serializer

Merge multiple streams into one stream in sequence or parallel.

process.nextTick but always with args

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

Fast deep equal

extend like a boss

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

Create a stream that emits events from multiple other streams

A stream that emits multiple other streams one after another.

Constant-time comparison of Buffers