Modern VError

TError.ts

interface TErrorOptions<Info, Cause> {
  readonly msg?: string;
  readonly info?: Info;
  readonly cause?: Cause;
}

class TError<Info, Cause extends Error> extends Error {
  public info?: Info;
  public cause?: Cause;
  constructor({ msg, cause, info }: TErrorOptions<Info, Cause>) {
    super(msg, cause ? { cause } : undefined);
    if (typeof info !== "undefined") {
      this.info = info;
    }
  }
}

const error1 = new TError({ msg: "Expected foo" });
console.error("error1", error1);

const error2 = new TError({
  msg: "Expected foo to be a string",
  info: { foo: 123 },
});
console.error("error2", error2);

const error3 = new TError({
  msg: "Expected foo",
  info: { hello: "world" },
  cause: new TError({ info: { goodbye: "world" } }),
});
console.error("error3", error3);

Now just need to wait for tooling to catch up with cause...