An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.

Protocol Buffers for ECMAScript. The only JavaScript Protobuf library that is fully-compliant with Protobuf conformance tests.

ES spec-compliant shim for Object.hasOwn

ES2017 spec-compliant String.prototype.padEnd shim.

ESLint plugin about ECMAScript syntactic features.

Next-generation ES module bundler

Maintained replacement for ESLint's deprecated SourceCode#getJSDocComment along with other jsdoc utilities

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

A simple, lightweight JavaScript API for handling cookies

ES Proposal spec-compliant shim for Promise.allSettled

Lexes CommonJS modules, returning their named exports metadata

An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.

Utility package to determine if an `Array.prototype` method properly boxes the callback's receiver and third argument.

Engine for Shiki using JavaScript's native RegExp

ES spec-compliant shim for TypedArray.prototype.slice

An env-agnostic serializer and deserializer with recursion ability and types beyond JSON, based on the HTML structured clone algorithm.

TypeScript definitions for es-aggregate-error

TypeScript definitions for lodash-es

ES2017 spec-compliant String.prototype.padStart shim.

ES Proposal spec-compliant shim for Promise.prototype.finally