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