How to get data from files using gulp, run through a function, and get html files?

Question

JavaScript

There is an empty project.
You need to take files with a json structure like BEMJSON from folder A, run them through a self-written function, collect an HTML page and return HTML pages to folder B as a file.
How can this be implemented?

Answer 1

const fs = require('fs')
Well, you can continue to work with the file system using node.
For page templates, I recommend gulp-twig