work on sandbox

1 files changed, 9 insertions, 0 deletions

diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index 6b3acaa9..9802ea7c 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -22,6 +22,7 @@ class Backend {
         this.translator = new Translator();
         this.anki = new AnkiNull();
         this.options = null;
+        this.sequence = 0;
     }
 
     async prepare() {
@@ -36,6 +37,14 @@ class Backend {
         }
     }
 
+    sequenceNew() {
+        return this.sequence++;
+    }
+
+    sandbox() {
+        return document.getElementById('sandbox').contentWindow;
+    }
+
     onOptionsUpdated(options) {
         this.options = utilIsolate(options);