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6000 packages found
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.
An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.
Is this specifier a node.js core module?
ES spec-compliant shim for Object.hasOwn
Store information about any JS value in a side channel. Uses WeakMap if available.
a package manager for JavaScript
An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.
- javascript
- ecmascript
- polyfill
- shim
- es-shims
- es-shim API
- Iterator
- helpers
- from
- map
- filter
- take
- drop
- flatMap
- View more
the most correct and second fastest glob implementation in JavaScript
TypeScript is a language for application scale JavaScript development
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible
- Reflect.getPrototypeOf
- Object.getPrototypeOf
- proto
- __proto__
- [[Prototype]]
- getPrototypeOf
- ES5
- shim
- polyfill
- es-shim API
- browser
Spec-compliant polyfill for String.prototype.matchAll
A practical functional library for JavaScript programmers.
Another JSON Schema Validator
yargs the modern, pirate-themed, successor to optimist.
An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.
Get the byteLength out of a DataView, robustly.