ERROR in multi (webpack)-dev-server/client : <p>I'm new to webpack / reactjs, just follow the tutorial here: 
<a href="https://www.tutorialspoint.com/reactjs/reactjs_environment_setup.htm" rel="noreferrer">https://www.tutorialspoint.com/reactjs/reactjs_environment_setup.htm</a></p>

<p>Then after I 'npm start', I got error:</p>

<pre><code>ERROR in multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./main.js
Module not found: Error: Can't resolve 'babel' in '/var/www/jay/reactjs/react-app'
BREAKING CHANGE: It's no longer allowed to omit the '-loader' suffix when using loaders.
                 You need to specify 'babel-loader' instead of 'babel'.
 @ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./main.js
</code></pre>

<p>Any ideas?</p>
