Hey author I like this! It's very close to what I use for simple forms, my library `forn`:

    import forn from 'forn';
    
    export default () => (
      <form onSubmit={forn(data => console.log(data))}>
        <input name="firstName" placeholder="First Name" />
        <input name="lastName" placeholder="Last Name" />
        <button>Send!</button>
      </form>
    );

Test it: https://codesandbox.io/s/agitated-johnson-3hv96

Why do you need the register though? Is the hook needed to hold the refs? Is it only for compatibility with React Native or are there other reasons? With forn I use `e.target`, which should not be available in RN.