1 files changed, 15 insertions, 0 deletions
diff --git a/internal/ui/static/js/tt.js b/internal/ui/static/js/tt.js
new file mode 100644
index 00000000..f42cc47a
--- /dev/null
+++ b/internal/ui/static/js/tt.js
@@ -0,0 +1,15 @@
+let ttpolicy;
+if (window.trustedTypes && trustedTypes.createPolicy) {
+    //TODO: use an allow-list for `createScriptURL`
+    if (!ttpolicy) {
+        ttpolicy = trustedTypes.createPolicy('ttpolicy', {
+            createScriptURL: src => src,
+            createHTML: html => html,
+        });
+    }
+} else {
+    ttpolicy = {
+        createScriptURL: src => src,
+        createHTML: html => html,
+    };
+}