diff --git a/js/src/modal.js b/js/src/modal.js
index fb787208d8..1ea630c415 100644
--- a/js/src/modal.js
+++ b/js/src/modal.js
@@ -113,7 +113,7 @@ const Modal = (() => {
     }
 
     show(relatedTarget) {
-      if (this._isTransitioning) {
+      if (this._isTransitioning || this._isShown) {
         return
       }