Champion-maintained polyfill for the TC39 decimal proposal
Compile class and object decorators to ES5
An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.
Compile export default to ES2015
A polyfill for Array.prototype.flat and Array.prototype.flatMap
Polyfill for Temporal (https://github.com/tc39/proposal-temporal), an ECMA TC39 Stage 3 proposal
Wraps Throw Expressions in an IIFE
Compile the function.sent meta property to valid ES2015 code
Transform pipeline operator into call expressions
Compile function bind operator to ES5
Compile do expressions to ES5
Check if a character is decimal
JavaScript Signals proposal integration for Lit
64-bit big-endian signed integer-to-string conversion
ES proposal-spec-compliant Object.fromEntries shim.
ECMAScript spec-compliant polyfill/shim for `globalThis`
Babel preset for stage 1 plugins
Polyfill for Metadata Reflection API
deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify
deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results, with no public domain dependencies
A 373-byte Spec-Compliant Runtime-Only Implementation of the ECMAScript Try Operator Proposal Result class
A 100% compliant, self-hosted javascript parser with high focus on both performance and stability
Support for stage 3 proposals in acorn
Introduces a new ? token in an argument list which allows for partially applying an argument list to a call expression