React Render HTML

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In React, you can render HTML elements to the DOM by returning them from a React component. A React component is a piece of code that represents a part of a user interface.

Contents hide
1 The HTML Code in react
2 The Root Node

Here’s an example of a simple React component that renders an ‘h1‘ element:

import React from 'react';

function MyComponent() {
  return <h1>Hello World</h1>;
}

export default MyComponent;

This component can be rendered to the DOM by using the ‘ReactDOM.render()‘ method:

import React from 'react';
import ReactDOM from 'react-dom';
import MyComponent from './MyComponent';

ReactDOM.render(<MyComponent />, document.getElementById('root'));

This will render the ‘h1‘ element with the text “Hello World” to the element with the ID ‘root‘ in the DOM.

You can also use JSX syntax to render HTML elements. JSX is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files. Here’s the same example using JSX syntax:

import React from 'react';

function MyComponent() {
  return <h1>Hello World</h1>;
}

export default MyComponent;

import React from 'react';
import ReactDOM from 'react-dom';
import MyComponent from './MyComponent';

ReactDOM.render(<MyComponent />, document.getElementById('root'));

The HTML Code in react

In React, you can write HTML code using JSX syntax. JSX is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files.

Here’s an example of how you can write an HTML ‘div‘ element in React using JSX syntax:

import React from 'react';

function MyComponent() {
  return (
    <div>
      <h1>Hello World</h1>
      <p>This is some text</p>
    </div>
  );
}

export default MyComponent;

This code will render an HTML ‘div‘ element with an ‘h1‘ element and a ‘p‘ element inside of it.

JSX syntax can be used to write any HTML element, as well as React components. Here’s an example of how you can use JSX syntax to render a React component:

import React from 'react';

function MyComponent() {
  return (
    <div>
      <h1>Hello World</h1>
      <p>This is some text</p>
      <AnotherComponent />
    </div>
  );
}

function AnotherComponent() {
  return <p>This is another component</p>;
}

export default MyComponent;

This code will render an HTML ‘div‘ element with an ‘h1‘ element, a ‘p‘ element, and another React component called ‘AnotherComponent‘ inside of it.

The Root Node

In a React app, the root node is the top-level element in the DOM (Document Object Model) that contains all of the other elements in the app.

In a typical React app, the root node is an HTML ‘div‘ element with a specific ID. This element is usually created in the HTML file that serves as the entry point for the app.

Here’s an example of an HTML file with a root node:

<html>
  <body>
    <div id="root"></div>
  </body>
</html>

To render a React app to the root node, you can use the ‘ReactDOM.render()‘ method:

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';

ReactDOM.render(<App />, document.getElementById('root'));

This code will render the ‘App‘ component to the element with the ID ‘root‘.

The root node is important because it serves as the container for the rest of the elements in the app. All of the other elements in the app will be nested inside of the root node.