How to make component assembly from *.vue file?

Question

Vue.js

I decided to switch to this, because most of the necessary features are not provided through the CDN, but only through import and all that. Previously, I didn’t use any webpack assemblers or something like that, because I didn’t develop the frontend.
And I can't even find a normal guide. I want to transfer my components and so on to .vue files in parts. But I don't understand how. I already have Node and npm. I tried to do it through vue-cli (most of the lessons are outdated for the new version), but there the assembly goes under some kind of vue-cli that is assembled by itself. In short, I did not understand.
I'm a little better. To collect all the vue parts into one "independent" js file and then connect it to the site.

Answer 1

In main.js, it turns out that it was only necessary to write it like this, while deleting import Vue from 'vue'and finally the component in a separate part.

import hello from './components/HelloWorld.vue';
Vue.component('hello-world', hello)