Fourth path, backward compatible

[baybal]

class Query {
  constructor(data) {
    this.data = data;
  }
  async then () {
    this.somenewdata = await someAsyncFunc();
    return this;
  }
}

This way await new Query({data: 'helloworld'}) keeps the constructor synchronous, backward compatible, and keep .then working.

[benwiley4000]

This already works right? Thanks for the idea, I'm thinking of implementing it in a project I'm working on.