Build System of React-starter-kit
<p>I found the same question in stackOverflow unanswered: <a href="https://stackoverflow.com/questions/38055510/different-main-entry-point-in-package-json-for-node-and-browser">Different main entry point in package.json for node and browser</a>.</p>

<p>I just want to know how this configuration is done. 
How to specify different entries for different build targets in package.json?</p>

<p><a href="https://i.stack.imgur.com/V4KQP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/V4KQP.png" alt="enter image description here"></a></p>