How State Works in React – Explained with Code Examples

State is the most complex thing in React. In this tutorial, we'll explore all the basics of state in React. How State Works in React – Explained with Code Examples

State is the most complex thing in React, and it's something both beginners and experienced developers struggle to understand. So in this article, we'll explore all the basics of state in React.

Before understanding state, let's first understand some fundamentals so it's easy to wrap your head around state later.

How to Render Data in the UI in React

To render anything on the screen, we use the ReactDOM.render method in React.

It has the following syntax:

ReactDOM.render(element, container[, callback])

• element can be any HTML element, JSX or a component that returns JSX
• container is the element on the UI inside which we want to render the data
• callback is the optional function we can pass which gets called once something is rendered or re-rendered on the screen

Take a look at the below code:

import React from "react";
import ReactDOM from "react-dom";

const rootElement = document.getElementById("root");

ReactDOM.render(<h1>Welcome to React!</h1>, rootElement);

Here's a Code Sandbox Demo.

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