diff --git a/application/source/dom/customelement.mjs b/application/source/dom/customelement.mjs
index 2a3e69817dcbbbdbd2ffd3d14300e121ba9e0244..8e284f4c688f8b47c217bc4a726a4e7b7bc6bdd3 100644
--- a/application/source/dom/customelement.mjs
+++ b/application/source/dom/customelement.mjs
@@ -946,6 +946,11 @@ function initShadowRoot() {
         return this;
     }
 
+    const mapping = this.getOption("templateMapping", {});
+    if (isObject(mapping)) {
+        html = new Formatter(mapping).format(html);
+    }
+
     this.shadowRoot.innerHTML = html;
     return this;
 }