vue3json数据渲染

Question

```java
const socket = new WebSocket('ws://localhost:8080/stock-ws');


  socket.onmessage = (event) => {
      const data = JSON.parse(event.data);
      const dailyData = data.dailyData;
      console.log(data);
      const formattedData = dailyData.map(item => [
        new Date(item.date).getTime(), // Convert to timestamp
        item.close
      ]);

```为什么data.dailyData无法获取正确的值？data值为{"dailyData":[{"id":274,"stockId":1,"date":"2023/3/23 9:00","close":24.2400},{"id":275,"stockId":1,"date":"2023/3/23 9:01","close":15.6994},{"id":276,"stockId":1,"date":"2023/3/23 9:02","close":15.7664},{"id":277,"stockId":1,"date":"2023/3/23 9:03","close":15.7723},{"id":278,"stockId":1,"date":"2023/3/23 9:04","close":15.8235},{"id":279,"stockId":1,"date":"2023/3/23 9:05","close":15.3807},{"id":280,"stockId":1,"date":"2023/3/23 9:06","close":15.8086},{"id":281,"stockId":1,"date":"2023/3/23 9:07","close":15.6478},{"id":282,"stockId":1,"date":"2023/3/23 9:08","close":15.6138},{"id":283,"stockId":1,"date":"2023/3/23 9:09","close":15.6306},{"id":284,"stockId":1,"date":"2023/3/23 9:10","close":15.7085},{"id":285,"stockId":1,"date":"2023/3/23 9:11","close":15.3684}]}，显示undefined

Answer 1

你是打印什么值为undefined，data.dailyData吗？