Enabling React.js

Using React? First add some dependencies with npm:

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$ npm install react react-dom prop-types --save

Enable react in your webpack.config.js:

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// webpack.config.js
  // ...

  Encore
      // ...
+     .enableReactPreset()
  ;

Then restart Encore. When you do, it will give you a command you can run to install any missing dependencies. After running that command and restarting Encore, you're done!

Your .js and .jsx files will now be transformed through babel-preset-react.