inspect-js/node-deep-equal

Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.

Robustly `.call.bind()` a function

Get an iterator for any JS language value. Works robustly across all environments, all versions.

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

Is this an arguments object? It's a harder question than you think.

Is this value a JS ArrayBuffer?

Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

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

Is this value a JS SharedArrayBuffer?

Array#isArray for older browsers

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

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

ES6 spec-compliant RegExp.prototype.flags shim.

Store information about any JS value in a side channel. Uses WeakMap if available.

Which kind of boxed JS primitive is this?

Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

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

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

Returns an array of Typed Array names that are available in the current environment

A better forEach

Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?

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

Does this environment have JS Typed Arrays?

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

ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

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

The semantic version parser used by npm.

tap-producing test harness for node and browsers