Muc-app: cleaning code.

conversejs/custom/plugins/notes/templates/muc-note-app.js

@@ -9,22 +9,17 @@ import { __ } from 'i18n'
 export function tplMUCNoteApp (el, mucModel) {
   if (!mucModel) {
     // should not happen
-    el.classList.add('hidden') // we must do this, otherwise will have CSS side effects
     return html``
   }
   if (!mucModel.notes) {
     // too soon, not initialized yet (this will happen)
-    el.classList.add('hidden') // we must do this, otherwise will have CSS side effects
     return html``
   }
 
   if (!el.show) {
-    el.classList.add('hidden')
     return html``
   }
 
-  el.classList.remove('hidden')
-
   // eslint-disable-next-line no-undef
   const i18nNotes = __(LOC_moderator_notes)
   // eslint-disable-next-line no-undef

conversejs/custom/plugins/tasks/templates/muc-task-app.js

@@ -9,22 +9,17 @@ import { __ } from 'i18n'
 export function tplMUCTaskApp (el, mucModel) {
   if (!mucModel) {
     // should not happen
-    el.classList.add('hidden') // we must do this, otherwise will have CSS side effects
     return html``
   }
   if (!mucModel.tasklists) {
     // too soon, not initialized yet (this will happen)
-    el.classList.add('hidden') // we must do this, otherwise will have CSS side effects
     return html``
   }
 
   if (!el.show) {
-    el.classList.add('hidden')
     return html``
   }
 
-  el.classList.remove('hidden')
-
   // eslint-disable-next-line no-undef
   const i18nTasks = __(LOC_tasks)
   // eslint-disable-next-line no-undef

conversejs/custom/shared/components/muc-app.js

@@ -51,6 +51,16 @@ export class MUCApp extends CustomElement {
     return ''
   }
 
+  updated () {
+    if (this.innerText.trim() === '') {
+      this.classList.add('hidden') // we must do this, otherwise will have CSS side effects
+    } else {
+      this.classList.remove('hidden')
+    }
+
+    super.updated()
+  }
+
   toggleApp () {
     this.show = !this.show
     if (this.sessionStorangeShowKey) {