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.

ES Proposal spec-compliant shim for AggregateError

A simple cache for a few of the JS Error constructors.

ECMAScript spec-compliant polyfill/shim for `globalThis`

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Robustly set the [[Prototype]] of an object

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

My shareable eslint config

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

Convert encodings, uses iconv-lite

Evaluates javascript code blocks from markdown files.

An ES2015 spec-compliant `Function.prototype.name` shim

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

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