a function that allow you convert async express middleware without worry about exception

catchit.ts

const catchit = asynFn => (req, res, next) => asynFn(req, res, next).catch(next);

//usage

router.get('/', catchit(async (req, res, next) => {
  await data = db.get();
  throw 'err';
  res.json(data);
}));