For general installation and configuration take a look at the components package.
<!-- index.html -->
...
<body>
<label class="db-checkbox" for="checkbox-element">
<input type="checkbox" id="checkbox-element" name="States" />
Label
</label>
</body>
To add a descriptive text with HTML formatting (e.g., bold or italic text) to a checkbox, you should use a separate element for the message and link it via the aria-describedby-HTML-attribute for accessibility. This ensures that screen readers correctly associate the message with the checkbox.
<!-- Checkbox with formatted infotext -->
...
<body>
<label class="db-checkbox" for="checkbox-element">
<input
type="checkbox"
id="checkbox-element"
name="States"
aria-describedby="checkbox-message"
/>
Label
</label>
<p class="db-infotext" id="checkbox-message">Example <strong>Text</strong></p>
</body>