Interactor.js + Cypress

cypress-interactor.js

beforeEach(function() {
  // Tell Interactor where the applications DOM is
  // since Cypress runs the test specs in an isolated iframe (away from the app DOM)
  cy.window().then(remoteWindow => {
    Object.defineProperty(Interactor.prototype, "$dom", {
      get() {
        return remoteWindow;
      }
    });
  });
});