When working with Symfony Webpack Encore, importing React as a default module might not work by default because Webpack Encore uses its own configuration, which may not be set up to handle default imports of React. To use React as a default module, you'll need to make some adjustments to your project's Webpack Encore configuration.

Here's how you can do it:

  1. Install React and React-DOM: First, ensure that you have React and React-DOM installed in your project. If you haven't already installed them, you can do so using npm or yarn:

    npm install react react-dom # or yarn add react react-dom
  2. Update Webpack Encore Configuration: In your Symfony project, navigate to the webpack.config.js file. This file contains the Webpack Encore configuration for your project. Add the following lines to the configuration:

    // webpack.config.js .configureBabel((config) => { // Include "react" in the list of presets config.presets.push('@babel/preset-react'); })

    By including the @babel/preset-react in the Babel configuration, you enable support for JSX and React-specific features.

  3. Use React as Default Module: Now, you can import React as a default module in your JavaScript files:

    // ExampleComponent.js import React from 'react'; function ExampleComponent() { return <div>Hello, React!</div>; } export default ExampleComponent;
  4. Use React Components: With React set up as a default module, you can now use React components in your application:

    // index.js import React from 'react'; import ReactDOM from 'react-dom'; import ExampleComponent from './ExampleComponent'; ReactDOM.render(<ExampleComponent />, document.getElementById('root'));

    In this example, we are rendering the ExampleComponent as a default module within the HTML element with the ID root.

After making these changes, your Symfony Webpack Encore project should be able to handle default imports of React and React components. If you encounter any issues, double-check your configuration and ensure that you have correctly installed React and React-DOM in your project.

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