TypeError: 不能读取空的属性 (读取 'db')

我的代码为：`import localforage from "localforage"; export const db_upload = localforage.createInstance({ name: "test", storeName: "upload" });` 错误：`TypeError: Cannot read properties of null (reading 'db') at _tryReconnect (localforage.js:770:1) at localforage.js:819:1` localforage 未能成功初始化，导致实例创建失败。我们如何确保在创建实例之前，localforage 已经成功初始化？