A few years ago, Google and Microsoft partnered up to work together on Angular and TypeScript. This partnership has helped TypeScript support two important features: decorators and reflect-metadata. Decorators are one of the cornerstones of our Angular code and, along with the reflect-metadata API, play a key role in the inner workings of Angular. These two features are based on active TC39 proposals and their importance goes beyond Angular. Once accepted into the Javascript standard, they can open the door for developers to implement exciting new features that were not possible to implement before. In this talk, we’ll understand how decorators work, how to write our own custom decorators and take advantage of the reflect-metedata API to make your Angular code cleaner.