output.js

var Foo = /*#__PURE__*/function (_Bar) {
  "use strict";

  babelHelpers.inherits(Foo, _Bar);

  var _super = babelHelpers.createSuper(Foo);

  function Foo() {
    var _this;

    babelHelpers.classCallCheck(this, Foo);

    if (condition) {
      _this = _super.call(this);

      _bar.set(babelHelpers.assertThisInitialized(_this), {
        writable: true,
        value: "foo"
      });
    } else {
      _this = _super.call(this);

      _bar.set(babelHelpers.assertThisInitialized(_this), {
        writable: true,
        value: "foo"
      });
    }

    return babelHelpers.possibleConstructorReturn(_this);
  }

  return Foo;
}(Bar);

var _bar = new WeakMap();