`trim`, `lowercase`, `uppercase`: tries to do this even if there is no string and gets a TypeError

I previously opened an issue for this, but it was ignored. If trim(), lowercase(), or uppercase() is used in a string(), a TypeError error is thrown during validation if the incoming data is not a string.

Everything here is as it should be ✅

Everything here is as it should be ✅

But it wasn't supposed to be like this ❌

Temporary solution

We can use the transform() for now. However, this doesn't mean I should ignore the problem above.

import * as Yup from "yup";

const schema = Yup.string()
  .transform(property => typeof property === "string" ? property.trim() : property)
  .min(3);

console.log(schema.validateSync({}));