1 files changed, 17 insertions, 0 deletions
diff --git a/app/assets/javascripts/behaviors/markdown/highlight_current_user.js b/app/assets/javascripts/behaviors/markdown/highlight_current_user.js
new file mode 100644
index 00000000000..6208b3f0032
--- /dev/null
+++ b/app/assets/javascripts/behaviors/markdown/highlight_current_user.js
@@ -0,0 +1,17 @@
+/**
+ * Highlights the current user in existing elements with a user ID data attribute.
+ *
+ * @param elements DOM elements that represent user mentions
+ */
+export default function highlightCurrentUser(elements) {
+  const currentUserId = gon && gon.current_user_id;
+  if (!currentUserId) {
+    return;
+  }
+
+  elements.forEach(element => {
+    if (parseInt(element.dataset.user, 10) === currentUserId) {
+      element.classList.add('current-user');
+    }
+  });
+}