substack/tape

node's assert.deepEqual algorithm

return the first argument that is `!== undefined`

the most correct and second fastest glob implementation in JavaScript

A robust, ES3 compatible, "has own property" predicate.

Browser-friendly inheritance fully compatible with standard node.js inherits()

parse argument options

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

ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

resolve like require.resolve() on behalf of files asynchronously and synchronously

My shareable eslint config

Command line tool for generating a changelog from git tags and commit history

writable stream that concatenates strings or binary data and calls a callback with the result

Run scripts that set and use environment variables across platforms

A simple static file server middleware

Convert encodings, uses iconv-lite

transform the ast on a recursive walk

Command line tool for creating or updating a .npmignore file based on .gitignore.

the Istanbul command line interface

Ensure that when you `npm publish`, the "latest" tag is only set for the truly latest version.

The semantic version parser used by npm.

A Test-Anything-Protocol library for JavaScript

parse the test anything protocol

a through stream that starts paused and resumes on the next tick

simplified stream construction

Robustly `.call.bind()` a function

An ES5 spec-compliant `Array.prototype.every` shim/polyfill/replacement that works as far down as ES3.

ignorefile/includefile matching .gitignore spec

A better forEach

Determine the `package.json#type` which applies to a location

Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag

Does the current environment have `import()` support?

Given an object and a property, replaces a property descriptor (or deletes it), and returns a thunk to restore it.

string representations of objects in node and the browser

ES2015-compliant shim for Object.is - differentiates between -0 and +0

ES5 spec-compliant shim for String.prototype.trim

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

Validate or fix code that doesn't adhere to EditorConfig settings or infer settings from existing code.

Fixtures of ES values, for testing purposes

A very strict and proper argument parser.

Portable NPM scripts when those have to work on Windows too