library_idbfs.js: Also use e.target.error for transaction.onerror

Author: past-due

src/library_idbfs.js

@@ -269,8 +269,9 @@ addToLibrary({
         }
       };
 
-      transaction.onerror = (e) => {
-        done(this.error);
+      // transaction may abort if (for example) there is a QuotaExceededError
+      transaction.onerror = transaction.onabort = (e) => {
+        done(e.target.error);
         e.preventDefault();
       };
 
@@ -280,12 +281,6 @@ addToLibrary({
         }
       };
 
-      // transaction may abort if (for example) there is a QuotaExceededError
-      transaction.onabort = (e) => {
-        done(e.target.error); // DOMException
-        e.preventDefault();
-      };
-
       // sort paths in ascending order so directory entries are created
       // before the files inside them
       create.sort().forEach((path) => {