should i do front end or backend code example

Example 1: front end and back end

The term “front-end” refers to the user interface, while “back-end” means the
server, application and database that work behind the scenes to deliver
information to the user.

Example 2: is javascript front end or backend

JavaScript is a front-end language in a browser, but using node.js it can
also be used as a backend language.