diff --git a/framework/core/js/forum/src/components/Composer.js b/framework/core/js/forum/src/components/Composer.js
index 8eadeea25..d0cbed504 100644
--- a/framework/core/js/forum/src/components/Composer.js
+++ b/framework/core/js/forum/src/components/Composer.js
@@ -332,6 +332,10 @@ class Composer extends Component {
     this.oldPosition = this.position;
   }
 
+  isMobile() {
+    return this.$backdrop && this.$backdrop.length;
+  }
+
   /**
    * Confirm with the user that they want to close the composer and lose their
    * content.
diff --git a/framework/core/js/forum/src/components/EditPostComposer.js b/framework/core/js/forum/src/components/EditPostComposer.js
index 90d0b6aa7..52c863f62 100644
--- a/framework/core/js/forum/src/components/EditPostComposer.js
+++ b/framework/core/js/forum/src/components/EditPostComposer.js
@@ -20,7 +20,7 @@ export default class EditPostComposer extends ComposerBody {
       // minimize the composer in order to see the preview. We do this as a
       // timeout so that it occurs after the click handler on the composer
       // itself that shows the composer if minimized.
-      if (app.composer.$backdrop.length) {
+      if (app.composer.isMobile()) {
         setTimeout(() => app.composer.minimize(), 0);
       }
 
diff --git a/framework/core/js/forum/src/components/ReplyComposer.js b/framework/core/js/forum/src/components/ReplyComposer.js
index 38b67d746..ab161485f 100644
--- a/framework/core/js/forum/src/components/ReplyComposer.js
+++ b/framework/core/js/forum/src/components/ReplyComposer.js
@@ -22,7 +22,7 @@ export default class ReplyComposer extends ComposerBody {
       // minimize the composer in order to see the preview. We do this as a
       // timeout so that it occurs after the click handler on the composer
       // itself that shows the composer if minimized.
-      if (app.composer.$backdrop.length) {
+      if (app.composer.isMobile()) {
         setTimeout(() => app.composer.minimize(), 0);
       }