-panel>
                <x-tab title="index.html" active>
                    <x-code-viewer src="./examples/sites/imports/index.html" name=""></x-code-viewer>
                </x-tab>
                <x-tab title="index.css">
                    <x-code-viewer src="./examples/sites/imports/index.css" name=""></x-code-viewer>
                </x-tab>
                <x-tab title="index.js">
                    <x-code-viewer src="./examples/sites/imports/index.js" name=""></x-code-viewer>
                </