How do I create controlled components in React?

How do I create controlled components in React?

To create controlled components in React, you need to manage the component's state using React's state management. This means that the form elements' values are controlled by React state.

Can you give me an example of a controlled input?

Sure! Here's a simple example:

import React, { useState } from 'react';

function ControlledInput() {
  const [value, setValue] = useState('');

  const handleChange = (event) => {
    setValue(event.target.value);
  };

  return (
    <input type="text" value={value} onChange={handleChange} />
  );
}

What happens if I don't use controlled components?

If you don't use controlled components, the form elements will manage their own state, which can lead to inconsistencies between the UI and the component's state.

Are there any performance considerations with controlled components?

Yes, controlled components can lead to performance issues if not managed properly, especially with large forms. It's important to optimize re-renders.