Function onSubmit

packages/react-aria-components/test/Form.test.js:32–37

    function Test() {
      let [serverErrors, setServerErrors] = React.useState({});
      let onSubmit = e => {
        e.preventDefault();
        setServerErrors({
          name: 'Invalid name.'
        });
      };

      return (
        <Form data-testid="form" onSubmit={onSubmit} validationErrors={serverErrors}>