So you have already worked with custom elements?
Try to use the SERACH of the VELO-FORUM…
So, as i understand you want to start to work from Wix-Editors POV ???
- First start your editor
- Enable the DEV-MODE (developers-mode) inside your Wix-Editor.
Now you have the view from developers POV. - To be able to insert your wished functionality, you will have to add a CUSTOM-ELEMENT. As i can see, you already worked with custom-elements, so you will have already some experience in the usage of them and surely you will also have some HTML and CSS knowledge.
Use the SEARCH of VELO-FORUM and find related articles. There are a lot of them already. They will lead you to the right direction. A assume you are already an experienced coder → so you will find your SOLUTION.