In React, to get the value from an input box, you can use controlled components. This involves linking the input field’s value to the component’s state and updating the state as the user types.

Key Steps:

1. State Initialization: Use useState in functional components or this.state in class components to store the input value.
2. Input Binding: Bind the input’s value to the state variable.
3. Event Handling: Update the state using an onChange event handler to capture user input.

This method ensures React maintains control over the form input, providing real-time access to its value.