https://eloquentjavascript.net/11_async.html#i_UvyahfUnfl

Eloquent JavaScript 1101 Tracking the scalpel.js

async function locateScalpel(nest) {
  let curr = nest.name;
  let next = await anyStorage(nest, curr, "scalpel");

  while (next !== curr) {
    curr = next;
    next = await anyStorage(nest, curr, "scalpel");
  }

  return curr;
}

/**
 * Without async/await version
 */
function locateScalpel2(nest) {
  const locateHelper = (curr) => {
    return anyStorage(nest, curr, "scalpel")
      .then((next) =>{
        if (next === curr) {
          return curr;
        }

        return locateHelper(next);
      });
  };

  return locateHelper(nest.name);
}

locateScalpel(bigOak).then(console.log);
locateScalpel2(bigOak).then(console.log);
// → Butcher Shop