Since 2.8.6: Uncaught (in promise) TypeError: Cannot use 'in' operator to search for 'default' in undefined

During validation, the error below is shown.

This is only in 2.8.6+

I’ve narrowed it down to a piece of my Yup schema, where it’s using ‘.when’ against an element in the parent.

Example:

export const AbcSchema = yup.object().shape({
    field1: yup.string().required(),

    obj2: yup.object({
        obj2Field: yup.string().max(255).when('field1', (field1) => {
            if (field1 === 'value') return yup.string().required()
        }),
    }).nullable()
}

yup: 0.32.11 hookform/resolvers: 2.8.6

[jorisre]

Thank you for reporting the issue, I’ll fix it tonight

[bluebill1049]

we no longer swallow errors from schema, which users should fix their schema error.