Yup validate multiple schemas for the same field (Joi alternatives)

yup-validate-alternatives.js

// First you define a method called `oneOfSchemas`

yup.addMethod(yup.MixedSchema, "oneOfSchemas", function (schemas) {
  return this.test(
    "one-of-schemas",
    "Not all items in ${path} match one of the allowed schemas",
    (item) =>
      schemas.some((schema) => schema.isValidSync(item, { strict: true }))
  );
});

// Then you use it as follows:

title: yup
  .mixed()
  .oneOfSchemas([
    yup.object().noUnknown().shape(SchemaObject1),
    yup.object().noUnknown().shape(SchemaObject2),
  ]);

// Inspired by https://gist.github.com/cb109/8eda798a4179dc21e46922a5fbb98be6

Very nice, I just had to change lines 7/ 8 to:
(item) =>
schemas.reduce((bool, schema) => bool || schema.isValidSync(item, { strict: true}), false)
That it will be ok if one of the schemas validates.