I think we can change Js.Exn.raiseError function to:

let raiseError = str => raise(Failure(str))

Playground

There is no idiomatic way to throw other errors like EvalError. In fact, there never was.

Something we can support is exception name as error name.

exception EvalError(string)


raise(EvalError("foo"))

compile to:

throw new EvalError("foo", {
        cause: {
          RE_EXN_ID: "EvalError",
          _1: "foo"
        }
      });

That's not the point. How we throw an error doesn't matter since it might come from an unexpected runtime exception. It still shouldn't break in the case. If the code is in Js_dump, I can probably fix it myself.

This is how I see the solution for the issue #6933

I can implement it myself during the week