Why is data lost at electron？

After react runs the restart program in electron, the cached data in electron is lost, and the web page is not lost。

```

const db = new PouchDB("testdb");
const onCeateDB = () => {
const todo = {
_id: new Date().toISOString(),
title: `这是一条数据${Date.now()}`,
completed: false,
};
db.put(todo, function callback(err, result) {
if (!err) {
console.log("Successfully posted a todo!", result);
}
});
};

const onGetData = () => {
db.allDocs({ include_docs: true, descending: true }, function (err, doc) {
console.log(doc.rows);
});
};

创建数据库
获取数据库
```