Why is data lost at electron？

[codepandy]

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);
    });
  };


<button onClick={onCeateDB}>创建数据库</button>
      <button onClick={onGetData}>获取数据库</button>