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

node style hmacs in the browser

delay the evaluation of a paramless async function and cache the result

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

Like duplexer but using streams3

https module compatability for browserify

A simple in-memory filesystem. Holds data in a javascript object.

Tests if a JSON property can be accessed using . syntax

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

Merge multiple streams into one stream in sequence or parallel.

JSON.parse with bigints support

This is a polyfill for Buffer#indexOf introduced in NodeJS 4.0.

Convert directories to glob compatible strings

return list of CallSite objects from a captured stacktrace

Implements performance.now (based on process.hrtime).

set blocking stdio and stderr ensuring that terminal output does not truncate

Various hash functions that could be run by both browser and node

One promise for multiple requests in flight to avoid async duplication

Returns an array of all enumerable symbol properties found directly upon a given object

btoa for Node.JS (it's a one-liner)