Node.js list directory tree

tree.js

  const fs = require('fs');
  function tree(dir, shortName = dir, prefix = '') {
      const ls = fs.readdirSync(dir);
      const isDir = ls.map(item => fs.statSync(`${dir}/${item}`).isDirectory());
      const files = ls.filter((item, index) => !isDir[index]);
      const dirs = ls.filter((item, index) => isDir[index]);
      const filesPrefix = prefix + '    ';
      console.log();
      console.log(`${prefix}${shortName || '.'}/`);
      if (files.length) {
          console.log(files.map(f => `${prefix}    ${f}`).join('\n'));
      }
      dirs.forEach(item => tree(`${dir}/${item}`, `${shortName}${shortName ? '/' : ''}${item}`, prefix + '    '));
  }