render description - tasks work - gfm is juicy

app/assets/javascripts/issue_show/index.js

 import Vue from 'vue';
-import IssueTitle from './issue_title.vue';
+import IssueTitle from './issue_title_description.vue';
 import '../vue_shared/vue_resource_interceptor';
 
 (() => {
   const issueTitleData = document.querySelector('.issue-title-data').dataset;
-  const { initialTitle, endpoint } = issueTitleData;
+  const { candescription, endpoint } = issueTitleData;
 
   const vm = new Vue({
     el: '.issue-title-entrypoint',
     render: createElement => createElement(IssueTitle, {
       props: {
-        initialTitle,
+        candescription,
         endpoint,
       },
     }),

app/assets/javascripts/issue_show/issue_title.vue → app/assets/javascripts/issue_show/issue_title_description.vue

@@ -5,8 +5,8 @@ import Service from './services/index';
 
 export default {
   props: {
-    initialTitle: { required: true, type: String },
     endpoint: { required: true, type: String },
+    candescription: { required: true, type: String },
   },
   data() {
     const resource = new Service(this.$http, this.endpoint);
@@ -30,7 +30,8 @@ export default {
     return {
       poll,
       timeoutId: null,
-      title: this.initialTitle,
+      title: null,
+      description: null,
     };
   },
   methods: {
@@ -39,26 +40,50 @@ export default {
       this.triggerAnimation(body);
     },
     triggerAnimation(body) {
-      const { title } = body;
+      const { title, description } = body;
+
+      this.descriptionText = body.description_text;
 
       /**
       * since opacity is changed, even if there is no diff for Vue to update
       * we must check the title even on a 304 to ensure no visual change
       */
-      if (this.title === title) return;
+      const noTitleChange = this.title === title;
+      const noDescriptionChange = this.description === description;
+
+      if (noTitleChange && noDescriptionChange) return;
+
+      const elementsToVisualize = [];
 
-      this.$el.style.opacity = 0;
+      if (!noTitleChange) {
+        elementsToVisualize.push(this.$el.querySelector('.title'));
+      } else if (!noDescriptionChange) {
+        elementsToVisualize.push(this.$el.querySelector('.wiki'));
+      }
+
+      elementsToVisualize.forEach((element) => {
+        element.classList.remove('issue-realtime-trigger-pulse');
+        element.classList.add('issue-realtime-pre-pulse');
+      });
 
       this.timeoutId = setTimeout(() => {
         this.title = title;
+        this.description = description;
 
-        this.$el.style.transition = 'opacity 0.2s ease';
-        this.$el.style.opacity = 1;
+        elementsToVisualize.forEach((element) => {
+          element.classList.remove('issue-realtime-pre-pulse');
+          element.classList.add('issue-realtime-trigger-pulse');
+        });
 
         clearTimeout(this.timeoutId);
       }, 100);
     },
   },
+  computed: {
+    descriptionClass() {
+      return `description ${this.candescription} is-task-list-enabled`;
+    },
+  },
   created() {
     if (!Visibility.hidden()) {
       this.poll.makeRequest();
@@ -72,9 +97,32 @@ export default {
       }
     });
   },
+  updated() {
+    new gl.TaskList({
+      dataType: 'issue',
+      fieldName: 'description',
+      selector: '.detail-page-description',
+    }).init();
+
+    $(this.$refs['issue-content-container-gfm-entry']).renderGFM();
+  },
 };
 </script>
 
 <template>
-  <h2 class="title" v-html="title"></h2>
+  <div>
+    <h2 class="title issue-realtime-trigger-pulse" v-html="title"></h2>
+    <div
+      :class="descriptionClass"
+      v-if="description"
+    >
+      <div
+        class="wiki issue-realtime-trigger-pulse"
+        v-html="description"
+        ref="issue-content-container-gfm-entry"
+      >
+      </div>
+      <textarea class="hidden js-task-list-field" v-if="descriptionText">{{descriptionText}}</textarea>
+    </div>
+  </div>
 </template>

app/assets/stylesheets/pages/issues.scss

@@ -18,6 +18,15 @@
   }
 }
 
+.issue-realtime-pre-pulse {
+  opacity: 0;
+}
+
+.issue-realtime-trigger-pulse {
+  transition: opacity 0.2s ease;
+  opacity: 1;
+}
+
 .check-all-holder {
   line-height: 36px;
   float: left;

app/controllers/projects/issues_controller.rb

@@ -198,7 +198,11 @@ class Projects::IssuesController < Projects::ApplicationController
 
   def rendered_title
     Gitlab::PollingInterval.set_header(response, interval: 3_000)
-    render json: { title: view_context.markdown_field(@issue, :title) }
+    render json: {
+      title: view_context.markdown_field(@issue, :title),
+      description: view_context.markdown_field(@issue, :description),
+      description_text: @issue.description,
+    }
   end
 
   protected

app/views/projects/issues/show.html.haml

@@ -51,17 +51,11 @@
 
 .issue-details.issuable-details
   .detail-page-description.content-block{ class: ('hide-bottom-border' unless @issue.description.present? ) }
-    .issue-title-data.hidden{ "data" => { "initial-title" => markdown_field(@issue, :title),
-      "endpoint" => rendered_title_namespace_project_issue_path(@project.namespace, @project, @issue),
+    .issue-title-data.hidden{ "data" => { "endpoint" => rendered_title_namespace_project_issue_path(@project.namespace, @project, @issue),
+      "canDescription" => can?(current_user, :update_issue, @issue) ? 'js-task-list-container' : '',
     } }
     .issue-title-entrypoint
-    - if @issue.description.present?
-      .description{ class: can?(current_user, :update_issue, @issue) ? 'js-task-list-container' : '' }
-        .wiki
-          = preserve do
-            = markdown_field(@issue, :description)
-        %textarea.hidden.js-task-list-field
-          = @issue.description
+
     = edited_time_ago_with_tooltip(@issue, placement: 'bottom', html_class: 'issue_edited_ago')
 
     #merge-requests{ data: { url: referenced_merge_requests_namespace_project_issue_url(@project.namespace, @project, @issue) } }

spec/javascripts/issue_show/issue_title_spec.js → spec/javascripts/issue_show/issue_title_description_spec.js

 import Vue from 'vue';
-import issueTitle from '~/issue_show/issue_title.vue';
+import issueTitle from '~/issue_show/issue_title_description.vue';
 
 describe('Issue Title', () => {
   let IssueTitleComponent;