ZDNet is referring to the TypeScript declaration file as the "raw source code". The actual implementation is https://github.com/then/is-promise/blob/master/ind

ZDNet is referring to the TypeScript declaration file as the "raw source code". The actual implementation is https://github.com/then/is-promise/blob/master/index.js https://github.com/then/is-promise/blob/master/index.js.