ECMAScript feature and API detection
Lexes CommonJS modules, returning their named exports metadata
Checks the ECMAScript version of .js glob against a specified version of ECMAScript with a shell command
A small library to detect which features of WebAssembly are supported in your current browser.
ESLint plugin about ECMAScript syntactic features.
jscodeshift codemod that convert CommonJS(require/exports) to ES Modules(import/export) for JavaScript/TypeScript
CSS vendor prefix detection and property feature testing.
Native-ESM powered web dev build tool
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
`Object.defineProperty`, but not IE 8's broken one.
ECMAScript spec abstract operations.
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
Helper package to shim a method into `Array.prototype[Symbol.unscopables]`
An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.
[](https://www.npmjs.com/package/@aws-sdk/middleware-recursion-detection) [![NPM downloads](https://img.shields.io/npm/dm/@aws-sdk/middleware-recursion-detectio
File System Access API with legacy fallback in the browser.
An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.
A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
ES2019 spec-compliant String.prototype.trimStart shim.
ESLint plugin about ECMAScript syntactic features.
ES6 spec-compliant RegExp.prototype.flags shim.
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible