1 files changed, 16 insertions, 0 deletions
diff --git a/web_src/js/webcomponents/polyfills.ts b/web_src/js/webcomponents/polyfills.ts
index 4a84ee9562..9575324b5a 100644
--- a/web_src/js/webcomponents/polyfills.ts
+++ b/web_src/js/webcomponents/polyfills.ts
@@ -16,3 +16,19 @@ try {
     return intlNumberFormat(locales, options);
   };
 }
+
+export function weakRefClass() {
+  const weakMap = new WeakMap();
+  return class {
+    constructor(target: any) {
+      weakMap.set(this, target);
+    }
+    deref() {
+      return weakMap.get(this);
+    }
+  };
+}
+
+if (!window.WeakRef) {
+  window.WeakRef = weakRefClass() as any;
+}