es6-promise-polyfill is a lightweight JavaScript library that brings the ES6 Promise API to environments lacking native support. This polyfill ensures consistent Promise behavior across browsers, including older versions of Internet Explorer and Node.js. It's ideal for projects targeting broad compatibility or relying on modern JavaScript features while maintaining backward compatibility. By including it, developers can utilize Promises without worrying about runtime errors arising from missing Promise implementations. It's a straightforward and reliable solution for adding ES6 Promise support.