I have tried a lots to paste code snippet in my programming tutorial website but most of the website online suggested to use external .js or .css file which may be slow down website speed then after, i tried to search at wix and found some good code block or code panel.
so can anyone help me how to add this type of code snippet in your wix pages like shown below
https://support.wix.com/en/article/corvid-tutorial-creating-previous-and-next-buttons-for-a-dynamic-item-page-with-code
