Zero CPU overhead, zero dependency, true event-loop blocking sleep

Deprecate all the things

Implements performance.now (based on process.hrtime).

A basic but performant promise implementation

Standard library

ECMAScript parsing infrastructure for multipurpose analysis

Returns true if an object was created by the `Object` constructor, or Object.create(null).

A replacement for process.exit that ensures stdio are fully drained before exiting.

Copies non-react specific statics from a child component to a parent component

invariant

core-js compat

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Is this specifier a node.js core module?

ASN.1 encoder and decoder

the path module from node core for browsers

Does this JS environment support the `name` property on functions?

Like duplexer but using streams3

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.

Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.