React JS -How to Capture Input Values

First install React JS : Follow this tutorial .

In React, you can use the onChange event handler to capture the value of an input field and store it in a variable. This allows you to access and use the value in other parts of your component, such as to perform calculations, validate the input, or submit the value to a server.

Here’s an example of how you can use the onChange event handler and the “useState” hook from the “react” package to capture the value of an input field and store it in a variable:

import React, { useState } from 'react';

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

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

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

In this example, the “MyComponent” component includes an input field that allows the user to enter text. When the user types in the input field, the “handleChange” function is called, which updates the value of the “value” state variable using the setValue function from the “useState” hook.

The “value” state variable is used to set the value prop on the input field, which causes the input field to update its value whenever the “value” state variable changes. This ensures that the input field always displays the latest value entered by the user.

Using the onChange event handler and the “useState” hook in this way allows you to easily capture and store the value of an input field in a variable. You can then use the value in other parts of your component, such as to perform calculations, validate the input, or submit the value to a server.

In summary, the onChange event handler and the “useState” hook are useful tools for capturing and storing the value of an input field in a variable in React. They make it easy to access and use the input value in other parts of your component, and they can help you build more interactive and user-friendly applications.