like ts-node, but uses esbuild.

ES node fetch for API sites

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

Next-generation ES module bundler

Detect Node.JS (as opposite to browser environment). ESM modification

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

TypeScript definitions for es-aggregate-error

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

A helper to optimistically set Symbol.toStringTag, when possible.

ES Object-related atoms: Object, ToObject, RequireObjectCoercible

An env-agnostic serializer and deserializer with recursion ability and types beyond JSON, based on the HTML structured clone algorithm.

`Object.defineProperty`, but not IE 8's broken one.

ECMAScript spec abstract operations.

An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.

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

CLI for Jasmine, a simple JavaScript testing framework for browsers and Node

Helper package to shim a method into `Array.prototype[Symbol.unscopables]`

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

Maintained replacement for ESLint's deprecated SourceCode#getJSDocComment along with other jsdoc utilities

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.