Decorators are a big and important feature for ECMAScript. The standardization of decorators has been ongoing since 2018. During this time, the proposal for extending JavaScript classes has evolved based on discussions, as well as feedback from users and implementers. In this talk, one of the champions of this design pattern, Daniel Ehrenberg, will share the history of the proposal, which is now in Stage 3 of ECMA TC39's standardization process.