es-shims/math.acosh

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

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

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

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

An ES-spec-compliant Math.log1p shim/polyfill/replacement that works as far down as ES3

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

Does the current JS environment have strict mode? ES5+ should; but let's not assume.