oneOf schema? [question]

How to write correctly following pseudocode?:

let mySchema = yup.object().shape({
    language: yup.mixed().oneOf([yup.string(), yup.array().of(yup.string())]).required()
});

So both objects should be correct: { language: 'en' } { language: ['en', 'de']}

[cb109]

I came across this while trying to validate that array items are of one of multiple allowed shapes/schemas. I solved it writing a custom method making use of yup.addMethod() and yup.mixed().test(): https://gist.github.com/cb109/8eda798a4179dc21e46922a5fbb98be6

If you feel like there is a better way to tackle this please let me know, thanks.

[jquense]

You want to use lazy