Merge branch '31910-add-vue-sidebar-container' into 'master'

[Part  1] Add Vue Issuable sidebar feature flag & app bundle

See merge request gitlab-org/gitlab!18199

app/assets/javascripts/issuable_sidebar/components/sidebar_app.vue

+<script>
+export default {
+  props: {
+    signedIn: {
+      type: Boolean,
+      required: true,
+    },
+    sidebarStatusClass: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+};
+</script>
+
+<template>
+  <aside
+    :class="sidebarStatusClass"
+    class="right-sidebar js-right-sidebar js-issuable-sidebar"
+    aria-live="polite"
+  ></aside>
+</template>

app/assets/javascripts/issuable_sidebar/sidebar_bundle.js

+import Vue from 'vue';
+
+import SidebarApp from './components/sidebar_app.vue';
+
+export default () => {
+  const el = document.getElementById('js-vue-issuable-sidebar');
+
+  if (!el) {
+    return false;
+  }
+
+  const { sidebarStatusClass } = el.dataset;
+  // An empty string is present when user is signed in.
+  const signedIn = el.dataset.signedIn === '';
+
+  return new Vue({
+    el,
+    components: { SidebarApp },
+    render: createElement =>
+      createElement('sidebar-app', {
+        props: {
+          signedIn,
+          sidebarStatusClass,
+        },
+      }),
+  });
+};

app/assets/javascripts/pages/projects/issues/show.js

@@ -5,6 +5,7 @@ import ZenMode from '~/zen_mode';
 import '~/notes/index';
 import initIssueableApp from '~/issue_show';
 import initRelatedMergeRequestsApp from '~/related_merge_requests';
+import initVueIssuableSidebarApp from '~/issuable_sidebar/sidebar_bundle';
 
 export default function() {
   initIssueableApp();
@@ -12,5 +13,9 @@ export default function() {
   new Issue(); // eslint-disable-line no-new
   new ShortcutsIssuable(); // eslint-disable-line no-new
   new ZenMode(); // eslint-disable-line no-new
-  initIssuableSidebar();
+  if (gon.features && gon.features.vueIssuableSidebar) {
+    initVueIssuableSidebarApp();
+  } else {
+    initIssuableSidebar();
+  }
 }

app/assets/javascripts/pages/projects/issues/show/index.js

@@ -3,5 +3,7 @@ import initShow from '../show';
 
 document.addEventListener('DOMContentLoaded', () => {
   initShow();
-  initSidebarBundle();
+  if (gon.features && !gon.features.vueIssuableSidebar) {
+    initSidebarBundle();
+  }
 });

app/assets/javascripts/pages/projects/merge_requests/init_merge_request_show.js

@@ -4,11 +4,16 @@ import ShortcutsIssuable from '~/behaviors/shortcuts/shortcuts_issuable';
 import { handleLocationHash } from '~/lib/utils/common_utils';
 import howToMerge from '~/how_to_merge';
 import initPipelines from '~/commit/pipelines/pipelines_bundle';
+import initVueIssuableSidebarApp from '~/issuable_sidebar/sidebar_bundle';
 import initWidget from '../../../vue_merge_request_widget';
 
 export default function() {
   new ZenMode(); // eslint-disable-line no-new
-  initIssuableSidebar();
+  if (gon.features && gon.features.vueIssuableSidebar) {
+    initVueIssuableSidebarApp();
+  } else {
+    initIssuableSidebar();
+  }
   initPipelines();
   new ShortcutsIssuable(true); // eslint-disable-line no-new
   handleLocationHash();

app/assets/javascripts/pages/projects/merge_requests/show/index.js

@@ -4,6 +4,8 @@ import initShow from '../init_merge_request_show';
 
 document.addEventListener('DOMContentLoaded', () => {
   initShow();
-  initSidebarBundle();
+  if (gon.features && !gon.features.vueIssuableSidebar) {
+    initSidebarBundle();
+  }
   initMrNotes();
 });

app/controllers/projects/issues_controller.rb

@@ -42,6 +42,10 @@ class Projects::IssuesController < Projects::ApplicationController
   before_action :authorize_import_issues!, only: [:import_csv]
   before_action :authorize_download_code!, only: [:related_branches]
 
+  before_action do
+    push_frontend_feature_flag(:vue_issuable_sidebar, project.group)
+  end
+
   respond_to :html
 
   alias_method :designs, :show

app/controllers/projects/merge_requests_controller.rb

@@ -21,6 +21,10 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
     push_frontend_feature_flag(:diffs_batch_load, @project)
   end
 
+  before_action do
+    push_frontend_feature_flag(:vue_issuable_sidebar, @project.group)
+  end
+
   around_action :allow_gitaly_ref_name_caching, only: [:index, :show, :discussions]
 
   def index

app/views/shared/issuable/_sidebar.html.haml

@@ -5,174 +5,178 @@
 - signed_in = !!issuable_sidebar.dig(:current_user, :id)
 - can_edit_issuable = issuable_sidebar.dig(:current_user, :can_edit)
 
-%aside.right-sidebar.js-right-sidebar.js-issuable-sidebar{ data: { signed: { in: signed_in } }, class: sidebar_gutter_collapsed_class, 'aria-live' => 'polite' }
-  .issuable-sidebar
-    .block.issuable-sidebar-header
-      - if signed_in
-        %span.issuable-header-text.hide-collapsed.float-left
-          = _('To Do')
-      %a.gutter-toggle.float-right.js-sidebar-toggle.has-tooltip{ role: "button", href: "#", "aria-label" => "Toggle sidebar", title: sidebar_gutter_tooltip_text, data: { container: 'body', placement: 'left', boundary: 'viewport' } }
-        = sidebar_gutter_toggle_icon
-      - if signed_in
-        = render "shared/issuable/sidebar_todo", issuable_sidebar: issuable_sidebar
-
-    = form_for issuable_type, url: issuable_sidebar[:issuable_json_path], remote: true, html: { class: 'issuable-context-form inline-update js-issuable-update' } do |f|
-      - if signed_in
-        .block.todo.hide-expanded
-          = render "shared/issuable/sidebar_todo", issuable_sidebar: issuable_sidebar, is_collapsed: true
-      .block.assignee.qa-assignee-block
-        = render "shared/issuable/sidebar_assignees", issuable_sidebar: issuable_sidebar, assignees: assignees
-
-      = render_if_exists 'shared/issuable/sidebar_item_epic', issuable_sidebar: issuable_sidebar
-
-      - milestone = issuable_sidebar[:milestone] || {}
-      .block.milestone
-        .sidebar-collapsed-icon.has-tooltip{ title: sidebar_milestone_tooltip_label(milestone), data: { container: 'body', html: 'true', placement: 'left', boundary: 'viewport' } }
-          = icon('clock-o', 'aria-hidden': 'true')
-          %span.milestone-title.collapse-truncated-title
-            - if milestone.present?
-              = milestone[:title]
-            - else
-              = _('None')
-        .title.hide-collapsed
-          = _('Milestone')
-          = icon('spinner spin', class: 'hidden block-loading', 'aria-hidden': 'true')
-          - if can_edit_issuable
-            = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link float-right', data: { track_label: "right_sidebar", track_property: "milestone", track_event: "click_edit_button", track_value: "" }
-        .value.hide-collapsed
-          - if milestone.present?
-            = link_to milestone[:title], milestone[:web_url], class: "bold has-tooltip", title: sidebar_milestone_remaining_days(milestone), data: { container: "body", html: 'true', boundary: 'viewport', qa_selector: 'milestone_link' }
-          - else
-            %span.no-value
-              = _('None')
-
-        .selectbox.hide-collapsed
-          = f.hidden_field 'milestone_id', value: milestone[:id], id: nil
-          = dropdown_tag('Milestone', options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options', filter: true, dropdown_class: 'dropdown-menu-selectable', placeholder: _('Search milestones'), data: { show_no: true, field_name: "#{issuable_type}[milestone_id]", project_id: issuable_sidebar[:project_id], issuable_id: issuable_sidebar[:id], milestones: issuable_sidebar[:project_milestones_path], ability_name: issuable_type, issue_update: issuable_sidebar[:issuable_json_path], use_id: true, default_no: true, selected: milestone[:title], null_default: true, display: 'static' }})
-
-      #issuable-time-tracker.block
-        // Fallback while content is loading
-        .title.hide-collapsed
-          = _('Time tracking')
-          = icon('spinner spin', 'aria-hidden': 'true')
-
-      - if issuable_sidebar.has_key?(:due_date)
-        .block.due_date
-          .sidebar-collapsed-icon.has-tooltip{ data: { placement: 'left', container: 'body', html: 'true', boundary: 'viewport' }, title: sidebar_due_date_tooltip_label(issuable_sidebar[:due_date]) }
-            = icon('calendar', 'aria-hidden': 'true')
-            %span.js-due-date-sidebar-value
-              = issuable_sidebar[:due_date].try(:to_s, :medium) || 'None'
+- if Feature.enabled?(:vue_issuable_sidebar, @project.group)
+  %aside#js-vue-issuable-sidebar{ data: { signed_in: signed_in,
+    sidebar_status_class: sidebar_gutter_collapsed_class } }
+- else
+  %aside.right-sidebar.js-right-sidebar.js-issuable-sidebar{ data: { signed: { in: signed_in } }, class: sidebar_gutter_collapsed_class, 'aria-live' => 'polite' }
+    .issuable-sidebar
+      .block.issuable-sidebar-header
+        - if signed_in
+          %span.issuable-header-text.hide-collapsed.float-left
+            = _('To Do')
+        %a.gutter-toggle.float-right.js-sidebar-toggle.has-tooltip{ role: "button", href: "#", "aria-label" => "Toggle sidebar", title: sidebar_gutter_tooltip_text, data: { container: 'body', placement: 'left', boundary: 'viewport' } }
+          = sidebar_gutter_toggle_icon
+        - if signed_in
+          = render "shared/issuable/sidebar_todo", issuable_sidebar: issuable_sidebar
+
+      = form_for issuable_type, url: issuable_sidebar[:issuable_json_path], remote: true, html: { class: 'issuable-context-form inline-update js-issuable-update' } do |f|
+        - if signed_in
+          .block.todo.hide-expanded
+            = render "shared/issuable/sidebar_todo", issuable_sidebar: issuable_sidebar, is_collapsed: true
+        .block.assignee.qa-assignee-block
+          = render "shared/issuable/sidebar_assignees", issuable_sidebar: issuable_sidebar, assignees: assignees
+
+        = render_if_exists 'shared/issuable/sidebar_item_epic', issuable_sidebar: issuable_sidebar
+
+        - milestone = issuable_sidebar[:milestone] || {}
+        .block.milestone
+          .sidebar-collapsed-icon.has-tooltip{ title: sidebar_milestone_tooltip_label(milestone), data: { container: 'body', html: 'true', placement: 'left', boundary: 'viewport' } }
+            = icon('clock-o', 'aria-hidden': 'true')
+            %span.milestone-title.collapse-truncated-title
+              - if milestone.present?
+                = milestone[:title]
+              - else
+                = _('None')
           .title.hide-collapsed
-            = _('Due date')
+            = _('Milestone')
             = icon('spinner spin', class: 'hidden block-loading', 'aria-hidden': 'true')
             - if can_edit_issuable
-              = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link float-right', data: { track_label: "right_sidebar", track_property: "due_date", track_event: "click_edit_button", track_value: "" }
+              = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link float-right', data: { track_label: "right_sidebar", track_property: "milestone", track_event: "click_edit_button", track_value: "" }
           .value.hide-collapsed
-            %span.value-content
-              - if issuable_sidebar[:due_date]
-                %span.bold= issuable_sidebar[:due_date].to_s(:medium)
-              - else
-                %span.no-value
-                  = _('None')
+            - if milestone.present?
+              = link_to milestone[:title], milestone[:web_url], class: "bold has-tooltip", title: sidebar_milestone_remaining_days(milestone), data: { container: "body", html: 'true', boundary: 'viewport', qa_selector: 'milestone_link' }
+            - else
+              %span.no-value
+                = _('None')
+
+          .selectbox.hide-collapsed
+            = f.hidden_field 'milestone_id', value: milestone[:id], id: nil
+            = dropdown_tag('Milestone', options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options', filter: true, dropdown_class: 'dropdown-menu-selectable', placeholder: _('Search milestones'), data: { show_no: true, field_name: "#{issuable_type}[milestone_id]", project_id: issuable_sidebar[:project_id], issuable_id: issuable_sidebar[:id], milestones: issuable_sidebar[:project_milestones_path], ability_name: issuable_type, issue_update: issuable_sidebar[:issuable_json_path], use_id: true, default_no: true, selected: milestone[:title], null_default: true, display: 'static' }})
+
+        #issuable-time-tracker.block
+          // Fallback while content is loading
+          .title.hide-collapsed
+            = _('Time tracking')
+            = icon('spinner spin', 'aria-hidden': 'true')
+
+        - if issuable_sidebar.has_key?(:due_date)
+          .block.due_date
+            .sidebar-collapsed-icon.has-tooltip{ data: { placement: 'left', container: 'body', html: 'true', boundary: 'viewport' }, title: sidebar_due_date_tooltip_label(issuable_sidebar[:due_date]) }
+              = icon('calendar', 'aria-hidden': 'true')
+              %span.js-due-date-sidebar-value
+                = issuable_sidebar[:due_date].try(:to_s, :medium) || 'None'
+            .title.hide-collapsed
+              = _('Due date')
+              = icon('spinner spin', class: 'hidden block-loading', 'aria-hidden': 'true')
+              - if can_edit_issuable
+                = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link float-right', data: { track_label: "right_sidebar", track_property: "due_date", track_event: "click_edit_button", track_value: "" }
+            .value.hide-collapsed
+              %span.value-content
+                - if issuable_sidebar[:due_date]
+                  %span.bold= issuable_sidebar[:due_date].to_s(:medium)
+                - else
+                  %span.no-value
+                    = _('None')
+              - if can_edit_issuable
+                %span.no-value.js-remove-due-date-holder{ class: ("hidden" if issuable_sidebar[:due_date].nil?) }
+                  \-
+                  %a.js-remove-due-date{ href: "#", role: "button" }
+                    = _('remove due date')
             - if can_edit_issuable
-              %span.no-value.js-remove-due-date-holder{ class: ("hidden" if issuable_sidebar[:due_date].nil?) }
-                \-
-                %a.js-remove-due-date{ href: "#", role: "button" }
-                  = _('remove due date')
-          - if can_edit_issuable
-            .selectbox.hide-collapsed
-              = f.hidden_field :due_date, value: issuable_sidebar[:due_date].try(:strftime, 'yy-mm-dd')
-              .dropdown
-                %button.dropdown-menu-toggle.js-due-date-select{ type: 'button', data: { toggle: 'dropdown', field_name: "#{issuable_type}[due_date]", ability_name: issuable_type, issue_update: issuable_sidebar[:issuable_json_path], display: 'static' } }
-                  %span.dropdown-toggle-text
-                    = _('Due date')
-                  = icon('chevron-down', 'aria-hidden': 'true')
-                .dropdown-menu.dropdown-menu-due-date
-                  = dropdown_title(_('Due date'))
-                  = dropdown_content do
-                    .js-due-date-calendar
-
-      - selected_labels = issuable_sidebar[:labels]
-      .block.labels
-        .sidebar-collapsed-icon.js-sidebar-labels-tooltip{ title: issuable_labels_tooltip(selected_labels), data: { placement: "left", container: "body", boundary: 'viewport' } }
-          = icon('tags', 'aria-hidden': 'true')
-          %span
-            = selected_labels.size
-        .title.hide-collapsed
-          = _('Labels')
-          = icon('spinner spin', class: 'hidden block-loading', 'aria-hidden': 'true')
-          - if can_edit_issuable
-            = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link qa-edit-link-labels float-right', data: { track_label: "right_sidebar", track_property: "labels", track_event: "click_edit_button", track_value: "" }
-        .value.issuable-show-labels.dont-hide.hide-collapsed.qa-labels-block{ class: ("has-labels" if selected_labels.any?) }
-          - if selected_labels.any?
-            - selected_labels.each do |label_hash|
-              = render_label(label_from_hash(label_hash).present(issuable_subject: nil), link: sidebar_label_filter_path(issuable_sidebar[:project_issuables_path], label_hash[:title]))
-          - else
-            %span.no-value
-              = _('None')
-        .selectbox.hide-collapsed
-          - selected_labels.each do |label|
-            = hidden_field_tag "#{issuable_type}[label_names][]", label[:id], id: nil
-          .dropdown
-            %button.dropdown-menu-toggle.js-label-select.js-multiselect.js-label-sidebar-dropdown{ type: "button", data: sidebar_label_dropdown_data(issuable_type, issuable_sidebar) }
-              %span.dropdown-toggle-text{ class: ("is-default" if selected_labels.empty?) }
-                = multi_label_name(selected_labels, "Labels")
-              = icon('chevron-down', 'aria-hidden': 'true')
-            .dropdown-menu.dropdown-select.dropdown-menu-paging.qa-dropdown-menu-labels.dropdown-menu-labels.dropdown-menu-selectable.dropdown-extended-height
-              = render partial: "shared/issuable/label_page_default"
-              - if issuable_sidebar.dig(:current_user, :can_admin_label)
-                = render partial: "shared/issuable/label_page_create"
-
-      = render_if_exists 'shared/issuable/sidebar_weight', issuable_sidebar: issuable_sidebar
-
-      - if issuable_sidebar.has_key?(:confidential)
+              .selectbox.hide-collapsed
+                = f.hidden_field :due_date, value: issuable_sidebar[:due_date].try(:strftime, 'yy-mm-dd')
+                .dropdown
+                  %button.dropdown-menu-toggle.js-due-date-select{ type: 'button', data: { toggle: 'dropdown', field_name: "#{issuable_type}[due_date]", ability_name: issuable_type, issue_update: issuable_sidebar[:issuable_json_path], display: 'static' } }
+                    %span.dropdown-toggle-text
+                      = _('Due date')
+                    = icon('chevron-down', 'aria-hidden': 'true')
+                  .dropdown-menu.dropdown-menu-due-date
+                    = dropdown_title(_('Due date'))
+                    = dropdown_content do
+                      .js-due-date-calendar
+
+        - selected_labels = issuable_sidebar[:labels]
+        .block.labels
+          .sidebar-collapsed-icon.js-sidebar-labels-tooltip{ title: issuable_labels_tooltip(selected_labels), data: { placement: "left", container: "body", boundary: 'viewport' } }
+            = icon('tags', 'aria-hidden': 'true')
+            %span
+              = selected_labels.size
+          .title.hide-collapsed
+            = _('Labels')
+            = icon('spinner spin', class: 'hidden block-loading', 'aria-hidden': 'true')
+            - if can_edit_issuable
+              = link_to _('Edit'), '#', class: 'js-sidebar-dropdown-toggle edit-link qa-edit-link-labels float-right', data: { track_label: "right_sidebar", track_property: "labels", track_event: "click_edit_button", track_value: "" }
+          .value.issuable-show-labels.dont-hide.hide-collapsed.qa-labels-block{ class: ("has-labels" if selected_labels.any?) }
+            - if selected_labels.any?
+              - selected_labels.each do |label_hash|
+                = render_label(label_from_hash(label_hash).present(issuable_subject: nil), link: sidebar_label_filter_path(issuable_sidebar[:project_issuables_path], label_hash[:title]))
+            - else
+              %span.no-value
+                = _('None')
+          .selectbox.hide-collapsed
+            - selected_labels.each do |label|
+              = hidden_field_tag "#{issuable_type}[label_names][]", label[:id], id: nil
+            .dropdown
+              %button.dropdown-menu-toggle.js-label-select.js-multiselect.js-label-sidebar-dropdown{ type: "button", data: sidebar_label_dropdown_data(issuable_type, issuable_sidebar) }
+                %span.dropdown-toggle-text{ class: ("is-default" if selected_labels.empty?) }
+                  = multi_label_name(selected_labels, "Labels")
+                = icon('chevron-down', 'aria-hidden': 'true')
+              .dropdown-menu.dropdown-select.dropdown-menu-paging.qa-dropdown-menu-labels.dropdown-menu-labels.dropdown-menu-selectable.dropdown-extended-height
+                = render partial: "shared/issuable/label_page_default"
+                - if issuable_sidebar.dig(:current_user, :can_admin_label)
+                  = render partial: "shared/issuable/label_page_create"
+
+        = render_if_exists 'shared/issuable/sidebar_weight', issuable_sidebar: issuable_sidebar
+
+        - if issuable_sidebar.has_key?(:confidential)
+          -# haml-lint:disable InlineJavaScript
+          %script#js-confidential-issue-data{ type: "application/json" }= { is_confidential: issuable_sidebar[:confidential], is_editable: can_edit_issuable }.to_json.html_safe
+          #js-confidential-entry-point
+
         -# haml-lint:disable InlineJavaScript
-        %script#js-confidential-issue-data{ type: "application/json" }= { is_confidential: issuable_sidebar[:confidential], is_editable: can_edit_issuable }.to_json.html_safe
-        #js-confidential-entry-point
+        %script#js-lock-issue-data{ type: "application/json" }= { is_locked: !!issuable_sidebar[:discussion_locked], is_editable: can_edit_issuable }.to_json.html_safe
+        #js-lock-entry-point
+
+        .js-sidebar-participants-entry-point
+
+        - if signed_in
+          - if issuable_sidebar[:project_emails_disabled]
+            .block.js-emails-disabled
+              .sidebar-collapsed-icon.has-tooltip{ title: notification_description(:owner_disabled), data: { placement: "left", container: "body", boundary: 'viewport' } }
+                = notification_setting_icon
+              .hide-collapsed= notification_description(:owner_disabled)
+          - else
+            .js-sidebar-subscriptions-entry-point
+
+        - project_ref = issuable_sidebar[:reference]
+        .block.project-reference
+          .sidebar-collapsed-icon.dont-change-state
+            = clipboard_button(text: project_ref, title: _('Copy reference'), placement: "left", boundary: 'viewport')
+          .cross-project-reference.hide-collapsed
+            %span
+              = _('Reference:')
+              %cite{ title: project_ref }
+                = project_ref
+            = clipboard_button(text: project_ref, title: _('Copy reference'), placement: "left", boundary: 'viewport')
+
+        - if issuable_sidebar.dig(:current_user, :can_move)
+          .block.js-sidebar-move-issue-block
+            .sidebar-collapsed-icon{ data: { toggle: 'tooltip', placement: 'left', container: 'body', boundary: 'viewport' }, title: _('Move issue') }
+              = custom_icon('icon_arrow_right')
+            .dropdown.sidebar-move-issue-dropdown.hide-collapsed
+              %button.btn.btn-default.btn-block.js-sidebar-dropdown-toggle.js-move-issue{ type: 'button',
+                data: { toggle: 'dropdown', display: 'static', track_label: "right_sidebar", track_property: "move_issue", track_event: "click_button", track_value: "" } }
+                = _('Move issue')
+              .dropdown-menu.dropdown-menu-selectable.dropdown-extended-height
+                = dropdown_title(_('Move issue'))
+                = dropdown_filter(_('Search project'), search_id: 'sidebar-move-issue-dropdown-search')
+                = dropdown_content
+                = dropdown_loading
+                = dropdown_footer add_content_class: true do
+                  %button.btn.btn-success.sidebar-move-issue-confirmation-button.js-move-issue-confirmation-button{ type: 'button', disabled: true }
+                    = _('Move')
+                    = icon('spinner spin', class: 'sidebar-move-issue-confirmation-loading-icon')
 
       -# haml-lint:disable InlineJavaScript
-      %script#js-lock-issue-data{ type: "application/json" }= { is_locked: !!issuable_sidebar[:discussion_locked], is_editable: can_edit_issuable }.to_json.html_safe
-      #js-lock-entry-point
-
-      .js-sidebar-participants-entry-point
-
-      - if signed_in
-        - if issuable_sidebar[:project_emails_disabled]
-          .block.js-emails-disabled
-            .sidebar-collapsed-icon.has-tooltip{ title: notification_description(:owner_disabled), data: { placement: "left", container: "body", boundary: 'viewport' } }
-              = notification_setting_icon
-            .hide-collapsed= notification_description(:owner_disabled)
-        - else
-          .js-sidebar-subscriptions-entry-point
-
-      - project_ref = issuable_sidebar[:reference]
-      .block.project-reference
-        .sidebar-collapsed-icon.dont-change-state
-          = clipboard_button(text: project_ref, title: _('Copy reference'), placement: "left", boundary: 'viewport')
-        .cross-project-reference.hide-collapsed
-          %span
-            = _('Reference:')
-            %cite{ title: project_ref }
-              = project_ref
-          = clipboard_button(text: project_ref, title: _('Copy reference'), placement: "left", boundary: 'viewport')
-
-      - if issuable_sidebar.dig(:current_user, :can_move)
-        .block.js-sidebar-move-issue-block
-          .sidebar-collapsed-icon{ data: { toggle: 'tooltip', placement: 'left', container: 'body', boundary: 'viewport' }, title: _('Move issue') }
-            = custom_icon('icon_arrow_right')
-          .dropdown.sidebar-move-issue-dropdown.hide-collapsed
-            %button.btn.btn-default.btn-block.js-sidebar-dropdown-toggle.js-move-issue{ type: 'button',
-              data: { toggle: 'dropdown', display: 'static', track_label: "right_sidebar", track_property: "move_issue", track_event: "click_button", track_value: "" } }
-              = _('Move issue')
-            .dropdown-menu.dropdown-menu-selectable.dropdown-extended-height
-              = dropdown_title(_('Move issue'))
-              = dropdown_filter(_('Search project'), search_id: 'sidebar-move-issue-dropdown-search')
-              = dropdown_content
-              = dropdown_loading
-              = dropdown_footer add_content_class: true do
-                %button.btn.btn-success.sidebar-move-issue-confirmation-button.js-move-issue-confirmation-button{ type: 'button', disabled: true }
-                  = _('Move')
-                  = icon('spinner spin', class: 'sidebar-move-issue-confirmation-loading-icon')
-
-    -# haml-lint:disable InlineJavaScript
-    %script.js-sidebar-options{ type: "application/json" }= issuable_sidebar_options(issuable_sidebar).to_json.html_safe
+      %script.js-sidebar-options{ type: "application/json" }= issuable_sidebar_options(issuable_sidebar).to_json.html_safe

ee/app/assets/javascripts/epic/components/epic_body.vue

 <script>
-import { mapState } from 'vuex';
+import { mapState, mapGetters } from 'vuex';
 
 import IssuableBody from '~/issue_show/components/app.vue';
+import IssuableSidebar from '~/issuable_sidebar/components/sidebar_app.vue';
 import RelatedItems from 'ee/related_issues/components/related_issues_root.vue';
 
 import EpicSidebar from './epic_sidebar.vue';
@@ -10,6 +11,7 @@ export default {
   epicsPathIdSeparator: '&',
   components: {
     IssuableBody,
+    IssuableSidebar,
     RelatedItems,
     EpicSidebar,
   },
@@ -30,10 +32,18 @@ export default {
       'initialDescriptionHtml',
       'initialDescriptionText',
       'lockVersion',
+      'sidebarCollapsed',
     ]),
+    ...mapGetters(['isUserSignedIn']),
     isEpicTreeEnabled() {
       return gon.features && gon.features.epicTrees;
     },
+    isVueIssuableEpicSidebarEnabled() {
+      return gon.features && gon.features.vueIssuableEpicSidebar;
+    },
+    sidebarStatusClass() {
+      return this.sidebarCollapsed ? 'right-sidebar-collapsed' : 'right-sidebar-expanded';
+    },
   },
 };
 </script>
@@ -84,6 +94,11 @@ export default {
       css-class="js-related-issues-block"
       path-id-separator="#"
     />
-    <epic-sidebar />
+    <issuable-sidebar
+      v-if="isVueIssuableEpicSidebarEnabled"
+      :signed-in="isUserSignedIn"
+      :sidebar-status-class="sidebarStatusClass"
+    />
+    <epic-sidebar v-else />
   </div>
 </template>

ee/app/assets/javascripts/pages/projects/issues/show/index.js

@@ -5,7 +5,9 @@ import UserCallout from '~/user_callout';
 
 document.addEventListener('DOMContentLoaded', () => {
   initShow();
-  initSidebarBundle();
+  if (gon.features && !gon.features.vueIssuableSidebar) {
+    initSidebarBundle();
+  }
   initRelatedIssues();
 
   if (document.getElementById('js-design-management')) {

ee/app/assets/javascripts/pages/projects/merge_requests/show/index.js

@@ -5,7 +5,9 @@ import { initReviewBar } from 'ee/batch_comments';
 
 document.addEventListener('DOMContentLoaded', () => {
   initShow();
-  initSidebarBundle();
+  if (gon.features && !gon.features.vueIssuableSidebar) {
+    initSidebarBundle();
+  }
   initMrNotes();
   initReviewBar();
 });

ee/app/controllers/groups/epics_controller.rb

@@ -18,6 +18,7 @@ class Groups::EpicsController < Groups::ApplicationController
   before_action do
     push_frontend_feature_flag(:epic_trees, @group)
     push_frontend_feature_flag(:roadmap_graphql, @group)
+    push_frontend_feature_flag(:vue_issuable_epic_sidebar, @group)
   end
 
   def index

spec/spec_helper.rb

@@ -154,6 +154,17 @@ RSpec.configure do |config|
       .with(:force_autodevops_on_by_default, anything)
       .and_return(false)
 
+    # The following can be removed once Vue Issuable Sidebar
+    # is feature-complete and can be made default in place
+    # of older sidebar.
+    # See https://gitlab.com/groups/gitlab-org/-/epics/1863
+    allow(Feature).to receive(:enabled?)
+      .with(:vue_issuable_sidebar, anything)
+      .and_return(false)
+    allow(Feature).to receive(:enabled?)
+      .with(:vue_issuable_epic_sidebar, anything)
+      .and_return(false)
+
     # Stub these calls due to being expensive operations
     # It can be reenabled for specific tests via:
     #