.babelrc

{
  "presets": [
    ["@babel/env", {
      "targets": { "esmodules": true }
    }]
  ]
}

index-transpiled.js

"use strict";

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

class A {
  foo() {
    return _asyncToGenerator(function* () {
      console.log('A#foo');
    })();
  }

}

class B extends A {
  foo() {
    var _superprop_callFoo = function _superprop_callFoo() {
      return _superprop_callFoo(...arguments);
    };

    return _asyncToGenerator(function* () {
      console.log('B#foo');

      _superprop_callFoo();
    })();
  }

}

new B().foo();

index.js

class A {
  async foo() {
    console.log('A#foo');
  }
}

class B extends A {
  async foo() {
    console.log('B#foo');
    super.foo();
  }
}

new B().foo();