es-shims/promise.allsettled

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

Robustly `.call.bind()` a function

Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.

ECMAScript spec abstract operations.

Get and robustly cache all JS language-level intrinsics at first require time

Loosely test a package's compliance with the es-shim API

My shareable eslint config

Use `npx aud` instead of `npm audit`, whether you have a lockfile or not!

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

ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines

Does this JS environment support the `name` property on functions?

Detect if we were run as a result of `npm publish`

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.

tap-producing test harness for node and browsers

Iterate any iterable JS value. Works robustly in all environments, all versions.