rename.js

// IIFE function that accepts 3 params
// target directory that hosts the files, current extesion to be changed,
// and the required extension
((dir_name, current_extension, target_extension) => {
  const fs = require("fs");
  const path = require("path");

  fs.readdir(dir_name, (err, files) => {
    if (err) return err;

    files.forEach((file) => {
      // const fileName = file.toString().split('.').slice(0, -1).join('.');
      const name = path.basename(file);
      const extension = path.extname(file);
      const fileName = path.basename(name, extension);
      // practising node scripting, just wanted to make it work a diferent way using path
      if (extension === "." + current_extension) {
        const newFile = `${dir_name}${fileName}.${target_extension}`;

        fs.rename(`${dir_name}${file}`, newFile, (err) => {
          if (err) return err;
          console.log("Renamed", file, "to", newFile);
        });
      }
    });
  });
})("./src/sass/", "css", "scss");