1 files changed, 2 insertions, 0 deletions

diff --git a/js/src/util/backdrop.js b/js/src/util/backdrop.js
index 775c09ec03..ad9fcb92fa 100644
--- a/js/src/util/backdrop.js
+++ b/js/src/util/backdrop.js
@@ -89,6 +89,8 @@ class Backdrop {
       ...Default,
       ...(typeof config === 'object' ? config : {})
     }
+
+    config.rootElement = config.rootElement || document.body
     typeCheckConfig(NAME, config, DefaultType)
     return config
   }