Contains Uppercase
Require at least one uppercase letter in a value.
Requires that a value contains at least one uppercase letter.
| Config flag | Type | Description |
|---|
containsUppercase | boolean | When true, requires at least one uppercase letter. |
const form = useForm({
initialValues: { token: '' },
validationSchema: {
token: { containsUppercase: true },
},
});
import { V } from 'formify-js';
V.containsUppercase();
| Scenario | Message |
|---|
| No uppercase letter present | Must contain an uppercase letter |
| Value | Result |
|---|
'passW' | ✅ Valid |
'password' | ❌ Invalid |
'123' | ❌ Invalid |
- This checks presence — at least one uppercase letter anywhere in the value.
- The
uppercase validator is the stricter sibling: it requires every letter to be uppercase.