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

Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.

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

Airbnb's base JS ESLint config, following our styleguide

TypeScript SDK for [S2](https://s2.dev), a serverless data store for streams.

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

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

Highlight DOM nodes within your stories

Robustly `.call.bind()` a function

Starts a server before your Jest tests and tears it down after.

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

ES2017 spec-compliant Object.values shim.

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

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

ES6 spec-compliant RegExp.prototype.flags shim.

Official Sentry Vite plugin

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

ES2017 spec-compliant Object.entries shim.

Airbnb's ESLint config, following our styleguide

Type safe utilities for throwing errors (and responses) if things aren't quite right. Inspired by npm.im/invariant