Visual basic and javascript

Hi, I have created a calculator using Javascript which I want to embed in a colorlib website for my construction company. I will be using php for the backend like form submission etc. Please tell me which templates are compatible for this. I need a basic HTML5, CSS premium template. I will be using visual studio code for any editing that I may need. I don’t want to buy an incompatible template and regret later. Kindly help ASAP.