React State Examples - Practical Guide for Beginners

Build a Simple Counter

Create a React component that displays a number and two buttons to increment and decrement the number using state.

Expected output: A counter UI that increases or decreases the number when buttons are clicked.

Hint: Use useState to hold the count and update it on button clicks.

Create a Toggle Button

Build a component with a button that toggles the visibility of a text paragraph.

Expected output: A button that shows or hides text when clicked.

Hint: Use boolean state and conditional rendering.

Form Input State Management

Create a form input that updates and displays the current input value using React state.

Expected output: An input field that displays the typed text below it.

Hint: Use the onChange event to update state.

React state is an object that holds data that may change over the lifecycle of a component. It is important because it allows components to create dynamic and interactive user interfaces.

In functional components, state is updated using the updater function returned by the useState hook, for example, setState(newValue).

Updating state triggers a re-render of the component, allowing the UI to reflect the latest data.