It’s very easy to add Common Ninja’s HTML code to Contao.
1. First, copy the app’s HTML code.
To do so, in the app’s dashboard, go to “Add to Website”. Here, click on the green button (it will automatically copy the code).
2. When working with your Contao page, in the text editor, you will notice two opposing arrows. This is the HTML feature. Click on it and paste the code you’ve copied. Save and exit and you should have Common Ninja’s app on your page.