Answer 1

javascript can be a good backend option with node.js.
for example, it's often used to create REST api.

node.js does not need any html or css to work, so it can be used for mostly anything. Web is usually the visual choice because javascript is really good at it!

I hope this help :)

Answer 2

node.js is a tool to write javascript directly on the computer instead of the web. It's very similar to python but it is made for javascript. very useful for writing server or console applications.

a little google search will give you more details. there is so much to cover about it that I can't reasonably write it all here.

Answer 3

Try node.js