JS error on continuous onboarding welcome page

Changelog: fixed
EE: true

ee/app/assets/javascripts/pages/registrations/welcome/index.js

@@ -6,10 +6,16 @@ const emailUpdatesForm = document.querySelector('.js-email-opt-in');
 const setupForCompany = document.querySelector('.js-setup-for-company');
 const setupForMe = document.querySelector('.js-setup-for-me');
 
-setupForCompany.addEventListener('change', () => {
-  emailUpdatesForm.classList.add('hidden');
-});
+if (emailUpdatesForm) {
+  if (setupForCompany) {
+    setupForCompany.addEventListener('change', () => {
+      emailUpdatesForm.classList.add('hidden');
+    });
+  }
 
-setupForMe.addEventListener('change', () => {
-  emailUpdatesForm.classList.remove('hidden');
-});
+  if (setupForMe) {
+    setupForMe.addEventListener('change', () => {
+      emailUpdatesForm.classList.remove('hidden');
+    });
+  }
+}

ee/spec/features/registrations/user_sees_new_onboarding_flow_spec.rb

@@ -11,7 +11,7 @@ RSpec.describe 'User sees new onboarding flow', :js do
     visit users_sign_up_welcome_path
   end
 
-  it 'shows the expected pages' do
+  def common_flow
     expect(page).to have_content('Welcome to GitLab')
     expect(page).to have_content('Your profile Your GitLab group Your first project')
     expect(page).to have_css('li.current', text: 'Your profile')
@@ -38,14 +38,29 @@ RSpec.describe 'User sees new onboarding flow', :js do
     expect(page).to have_field('project_path', with: 'test')
 
     click_on 'Create project'
+  end
+
+  it 'shows onboarding flow pages' do
+    common_flow
 
     expect(page).to have_content('Welcome to the guided GitLab tour')
 
     Sidekiq::Worker.drain_all
-
     click_on 'Show me the basics'
 
     expect(page).to have_content('Learn GitLab')
     expect(page).to have_css('.selectable', text: 'Label = ~Novice')
   end
+
+  context 'continuous onboarding experiment enabled' do
+    before do
+      stub_experiment_for_subject(learn_gitlab_a: true, learn_gitlab_b: true)
+    end
+
+    it 'shows continuous onboarding flow pages' do
+      common_flow
+
+      expect(page).to have_content('Get started with GitLab')
+    end
+  end
 end