babel/packages/babel-plugin-proposal-class-properties/test/fixtures/general/instance-undefined/expected.js

var Foo = function Foo() {
  babelHelpers.classCallCheck(this, Foo);
  Object.defineProperty(this, "bar", {
    configurable: true,
    enumerable: true,
    writable: true,
    value: void 0
  });
};