Is JavaScript enough for both Front end and Back end?

Question

Hi there!
I want to learn web development. My goal is to be a full stack web developer "It's hard but not impossible".
I've been wondering if I can learn only HTML5 & CSS3 and JavaScript, or I learn the previous languages and PHP.

Answer 1

Once you are comfortable with JS, it is easier to jump onto Node JS, or React JS which is considered to be well optimized.

Answer 2

With node.js you can use your knowledge of js to do backend.
But node.js is not completly same, everything realeted to browser and dom dont work in node.js