DBOpenRequest.onupgradeneeded = function(event) {
let db = event.target.result;
- db.createObjectStore("compgames", { keyPath: "vname" });
+ let upgradeTransaction = event.target.transaction;
+ if (!db.objectStoreNames.contains("compgames"))
+ db.createObjectStore("compgames", { keyPath: "vname" });
+ else
+ upgradeTransaction.objectStore("compgames");
};
}