Do not show the onboarding welcome page on mobile devices

ee/app/assets/javascripts/onboarding/onboarding_welcome/index.js

 import Vue from 'vue';
 import WelcomePage from './components/welcome_page.vue';
 import { parseBoolean } from '~/lib/utils/common_utils';
+import { redirectTo } from '~/lib/utils/url_utility';
+import onboardingUtils from './../utils';
+import breakpointInstance from '~/breakpoints';
 
 export default function() {
   const el = document.getElementById('js-onboarding-welcome');
@@ -11,6 +14,11 @@ export default function() {
 
   const { userAvatarUrl, projectFullPath, skipUrl, fromHelpMenu } = el.dataset;
 
+  if (!breakpointInstance.isDesktop()) {
+    onboardingUtils.updateOnboardingDismissed(true);
+    return redirectTo(skipUrl);
+  }
+
   return new Vue({
     el,
     render(h) {

ee/changelogs/unreleased/11968-make-sure-not-to-redirect-to-the-onboarding-welcome-page-on-mobile-devices.yml

+---
+title: Resolve Make sure not to redirect to the onboarding welcome page on mobile
+  devices
+merge_request: 14842
+author:
+type: fixed

ee/spec/features/onboarding/user_onboarding_spec.rb

@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 describe 'User Onboarding' do
+  include MobileHelpers
+
   let(:user) { create(:user) }
   let(:project) { create(:project) }
 
@@ -18,15 +20,29 @@ describe 'User Onboarding' do
     end
 
     describe 'help menu' do
-      it 'shows the "Learn GitLab" item in the help menu' do
+      before do
         visit root_dashboard_path
 
         find('.header-help-dropdown-toggle').click
+      end
 
+      it 'shows the "Learn GitLab" item in the help menu' do
         page.within('.header-help') do
           expect(page).to have_link('Learn GitLab', href: explore_onboarding_index_path(from_help_menu: true))
         end
       end
+
+      context 'when on a mobile device' do
+        before do
+          resize_screen_sm
+        end
+
+        it 'does not show the "Learn GitLab" item in the help menu' do
+          page.within('.header-help') do
+            expect(page).not_to have_link('Learn GitLab')
+          end
+        end
+      end
     end
 
     describe 'welcome page' do
@@ -40,6 +56,17 @@ describe 'User Onboarding' do
 
         expect(page).to have_content('Welcome to the Guided GitLab Tour')
       end
+
+      context 'when on a mobile device' do
+        before do
+          resize_screen_sm
+        end
+
+        it 'does not show the "Learn GitLab" welcome page' do
+          visit explore_onboarding_index_path
+          expect(page).not_to have_content('Welcome to the Guided GitLab Tour')
+        end
+      end
     end
 
     describe 'onboarding helper' do