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

🐻 Bear necessities for state management in React

Pure random number generator written in TypeScript

A light-weight module that brings Fetch API to node.js

TypeScript Execute (tsx): Node.js enhanced with esbuild to run TypeScript & ESM files

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

An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

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

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

The React Framework

JS Object representation of a stack frame

Is this specifier a node.js core module?

Type utilities for working with TypeScript + ESLint together

Image of a French alpine landscape.

ES2019 spec-compliant String.prototype.trimStart shim.

Create your next immutable state by mutating the current one

A small, fast, and correct TOML parser/serializer

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

Robustly `.call.bind()` a function

Modify a JS/TS file and write back magically just like JSON!