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

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

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

A small polyfill for Object.setprototypeof

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

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

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

Merge multiple streams into one stream in sequence or parallel.

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

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

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.

ES2015 `Object.assign()` ponyfill

extend like a boss

return list of CallSite objects from a captured stacktrace

Fast deep equal

Support for representing 64-bit integers in JavaScript

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