The one-liner node.js proxy middleware for connect, express, next.js and more
javascript standard data structure library which benchmark against C++ STL
An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.
Custom jest matchers to test the state of the DOM
simple, flexible, fun test framework
ES2019 spec-compliant String.prototype.trimStart shim.
Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.
Helper functions around Function call/apply/bind, for use in `call-bind`
Determine if the JS environment has Symbol support. Supports spec, or shams.
Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.
A node.js module for parsing form data, especially file uploads.
request the caniuse data to check browsers compatibilities
Syntax highlighting with language autodetection.
Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.
Get and robustly cache all JS language-level intrinsics at first require time
Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Does this JS environment support the `name` property on functions?
string representations of objects in node and the browser
React specific linting rules for ESLint
An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Determine if a function is a native generator function.
Returns an array of Typed Array names that are available in the current environment
`Object.defineProperty`, but not IE 8's broken one.