Validation Hooks

• On Form Initialization
• Extending the Class
• Override on Manual Submit

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Validation Hooks are special Event Hooks called after the submit or validation actions. They can return Promises.

Available Validation Hooks

Action	Executed Hook	Form	Field
submit() → validate()	onSuccess	✓	✓
submit() → validate()	onError	✓	✓

The Validation Hooks can return a Promise to wait for async operations.

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Legacy API — Version < 1.32

In older versions, onClear, onReset & onSubmit were handled differently:

• If defined in the Form or Field Class, they were treated as Event Handlers.
• If defined in the Field Definition, they were treated as Event Hooks.
• onSuccess & onError defined in the Form or Field Class were always Event Hooks.

Also, Validation Hooks were passed as onSubmit instead of hooks:

const onSubmit = {
  onSuccess(form) {
    console.log('Form Values!', form.values());
  },
  onError(form) {
    console.log('All form errors', form.errors());
  },
};

new Form({ ... }, { onSubmit }); // <--- was `onSubmit`, now `hooks`