<code>imports.js</code> file.
                For example, here is a page that uses a UMD build of <a href="https://day.js.org/">Day.js</a> and an ESM build of <a href="https://github.com/GoogleChrome/web-vitals">web-vitals</a>:
            </p>
            <iframe src="./examples/sites/imports/index.html" title="imports.js example" height="100"></iframe>
            <p>The text is rendered by the <code>&lt;x-metrics&gt;</code> component:</p>
            <x-code-viewer src="./examples/sites/imports/componen