Uppercase

The uppercase rule validates that every letter in a value is uppercase.

Configuration

validationSchema: {
  shout: { uppercase: true },
}

With a custom message:

shout: { uppercase: "Use uppercase letters only" }

V builder

import { V } from "formify-js";

V.uppercase()
V.uppercase("Use uppercase letters only")

Default message

Must be in uppercase

Examples

Things to know

• This is an all-letters-uppercase check, not a "contains one uppercase" check — for the latter use containsUppercase.
• Empty values pass unless required: true is also set.