reactjsHow do I use an online editor to develop with React.js?

Using an online editor to develop with React.js requires a few steps.

First, you'll need to create a project file. This can be done by setting up a folder with the files you need for your project, such as an index.html, style.css and index.js files.

Next, you'll need to include the React library in your project. This can be done by adding the following code to your index.html file:

<script src="https://unpkg.com/react@16/umd/react.development.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js" crossorigin></script>

After that, you'll need to write the React code in your index.js file. For example, the following code will render a <h1> element with the text "Hello World" to the page:

ReactDOM.render(
  <h1>Hello World</h1>,
  document.getElementById('root')
);

Finally, you'll need to add a <div> element with an id of root to your index.html file, like so:

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

Once all of these steps are completed, you can open the index.html file in your browser to view the rendered React code.

Parts of code and explanation:

• <script src="https://unpkg.com/react@16/umd/react.development.js" crossorigin></script>
  • This code imports the React library into the project.
• <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js" crossorigin></script>
  • This code imports the ReactDOM library into the project.
• ReactDOM.render(<h1>Hello World</h1>, document.getElementById('root'));
  • This code renders the <h1> element with the text "Hello World" to the page.
• <div id="root"></div>
  • This code adds a <div> element with an id of root to the index.html file.

## Helpful links

• React Documentation
• Using an Online Editor for React Development

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