Using Volt for e-commerce

Has anybody added any code to a website through the web browser using Volt?

I have just had an enquiry to build a small e-commerce site for handmade soaps. I have not yet spoken to the client, but it sounds like an ideal job for Volt if I can get it to work with some sort of billing cart solution, whether PayPal or perhaps something like Ecwid.

I just tried to experiment with this in some editable text areas, however the code </> symbol in the floating panel was always greyed out. If Volt can be used in this kind of situation so a client can edit products and update cart links from the the billing company it becomes incredibly useful.