node.js

// Create dir recursively if it does not exist!
const targetDir = 'path/to/dir';
targetDir.split('/').forEach((dir, index, splits) => {
  const parent = splits.slice(0, index).join('/');
  const dirPath = path.resolve(parent, dir);
  if (!fs.existsSync(dirPath)) {
    fs.mkdirSync(dirPath);
  }
});