render.js

return (
    <div>
      <div>Name: {name}</div>
      <div>Age: {age}</div>
      <input value={name} onChange={(e) => setName(e.target.value)}/>
      <input value={age} onChange={(e) => setAge(e.target.value)}/>
      <button onClick={handleSubmit}>Submit</button>
      <div style={{color: 'red' }}>
        {error.message}
      </div>
    </div>
  );