title: How does a web browser decide on an entry point among the files it receives from a server?
body: <p><strong>Situation:</strong> Say I type some website's URL into my search bar. The server sends some HTML and CSS files to my computer.</p>
  <p><strong>Question:</strong> How does my web browser decide which file among the received files is the entry point (or otherwise &quot;starting point&quot;) from which to start evaluating/rendering?</p>
  <p><strong>What I've tried</strong>: Googling various phrases and doing a cursory search on SO. But my search terms might've been suboptimal, and this question might seem stupid, because <em>I don't know what I don't know.</em></p>