React

by Amir Danish

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

React

import React from "react";
import { useForm } from "react-hook-form";

function App() {
  const { register, handleSubmit, errors } = useForm();
  const onSubmit = (data) => {
    // logs {firstName:"exampleFirstName", lastName:"exampleLastName"}
    console.log(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <input name="firstName" ref={register} />
      <input name="lastName" ref={register({ required: true })} />
      {errors.lastName && <span>"Last name is a required field."</span>}
      <input name="age" ref={register({ required: true })} />
      {errors.age && <span>"Please enter number for age."</span>}
      <input type="submit" />
    </form>
  );
}

ReactDOM.render(<App />, document.querySelector("#app"))