sindresorhus/component-emitter

Component-emitter is a lightweight, cross-platform event emitter library that provides simple event handling capabilities for JavaScript projects. It's designed for developers who need an EventEmitter-like functionality without the overhead of Node.js's built-in EventEmitter, making it ideal for browser environments and lightweight Node.js applications. The library offers both instance-based usage and mixin capabilities, allowing developers to easily add event handling to existing objects or prototypes while maintaining a minimal footprint.