There are plenty of synchronous calls in node and js. Not everything is async https://nodejs.org/api/fs.html#fs_dir_readsync https://nodejs.org/api/fs.html#fs_

There are plenty of synchronous calls in node and js. Not everything is async https://nodejs.org/api/fs.html#fs_dir_readsync https://nodejs.org/api/fs.html#fs_dir_readsync And that's just io, most function calls are synchronous also