href="#7-web-components-amp-custom-elements" class="header-anchor"></a>7. Web Components &amp; Custom Elements</h2><p>Web Components continue to gain adoption as developers seek more interoperable and reusable UI elements.</p>
<pre><code class="hljs javascript"><span class="hljs-keyword">class</span> <span class="hljs-title class_">HelloWorld</span> <span class="hljs-keyword">extends</span> <span class="hljs-title class_ inherited__">HTMLElement</span> {
  <span class="hljs-title function_">connectedCallbac