Is html, Css and javascript are enough to build an e-commerce Site

Question

How to create an e commerce site

Answer 1

No, you'll need SQL and a database, and something for the backend, like Node.js, Python, Golang, Java, DotNet, PHP, etc etc.
You may also want something like React for the front-end.
Then you'll also want/need some API to use to handle the payment and credit/debit card stuff.

That is, of course, if you're planning on building the site from scratch without the use of an e-commerce site builder with most of this already built-in.