Continuable vs Promises

gistfile1.txt

// ES6 syntax
var target = yield fs.readlink("/path/to/symlink");

// ES5 syntax
fs.readlink("/path/to/symlink")(function (err, target) {
  if (err) throw err;
  // do something with target
});

// Promised based
fs.readlink("/path/to/symlink").then(function (target) {
  // do something with target
});