title: What is a Less file?
body: <p>I've started working newly on the <a href="https://en.wikipedia.org/wiki/React_(web_framework)" rel="nofollow noreferrer">React</a> library. In the entire codebase that I've to work upon, I see <code>*.less</code> files which contain classes related to styles just as we used to have in CSS files for HTML/JavaScript pages.</p>
  <p>How is a .less file any different from the conventional CSS style sheets? Can we also use <code>*.css</code> files with <code>*.JSX</code> files for styling purposes?</p>