Viewing Page Source Code

Hello,

Is it normal that “wrappler dynamic codes” also display when viewing page source code?
Codes like this for example:

<h1 class="display-3" dmx-text="serverconnect1.data.query1[0].SiteTitle"></h1>
<h1 dmx-html="serverconnect1.data.query1[0].SiteEmail"></h1>

Thank you!