Define a data property on an object. Will fall back to assignment in an engine without descriptors.

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.

ES spec-compliant shim for TypedArray.prototype.slice

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

My shareable eslint config

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

Fixtures of ES values, for testing purposes

A better forEach

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

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

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

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

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

Robustly set the [[Prototype]] of an object

tap-producing test harness for node and browsers