We can’t see the code you are posting. On forums like this one if you want to display code (HTML, javascript, CSS) you need to select it and mark it as preformatted text </>
It kinda looks like font-awesome, although it doesn’t seem to have the proper syntax. font-awesome usually starts with a class of fa, fab, or fas depending on the version of font-awesome being used.
Thanks for the help. I think most of the code is related the + sign used in the demo file. I’m going a different rout now, and things are working fine.