Stuck on an issue?

It’s looks like TypeScript’s type decorator also does not work 😢. I’ve tried also using different versions, but without any luck. Here’s the same example from CodeSandbox, but uses ts-node or vite-node to run the server - https://github.com/jog1t/colyseus-issue-510.

🎉 What has worked for me is to define a schema class similar to this (see working-solution branch):

class State extends Schema {
  constructor() {
    super();
    this.property = "";
    this.number = 0;
  }
}

defineTypes(State, {
  property: "string",
  number: "number",
});

interface State extends Schema {
  property: string;
  number: number;
}

This seems to only be a problem for TypeScript if you are compiling to ES2022/ESNext. Public instance fields are added to subclass instances using Object.defineProperty immediately after the super() call returns so the property defined in the Schema constructor is being overwritten. I don’t think there is an elegant solution to fix this currently. Could move the getters and setters definition to outside the constructor but that’s kind of wonky.