如何从新的firebase.firestore.FieldValue.serverTimestamp()获取JavaScript Date对象 [英] How to get a JavaScript Date object from the new `firebase.firestore.FieldValue.serverTimestamp()`

问题描述

Firebase Firestore最近更改了时间戳管理方式，并且我无法从时间戳中检索date对象.

Firebase Firestore recently changed how they manage timestamps, and I'm unable to retrieve a date object from the timestamp.

如何从新的firebase.firestore.FieldValue.serverTimestamp()获取日期对象?

How do I get a date object from the new firebase.firestore.FieldValue.serverTimestamp()?

推荐答案

您只需要这样做:

yourFirestoreTimestamp.toDate()

如果您在控制台中查看Timestamp对象，则会看到.toDate() 是默认情况下在每个Timestamp上可用的功能.

If you look at the Timestamp object in the console you'll see that .toDate() is a function available by default on each Timestamp.

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但是，请注意，当您尚未与Firestore同步时 FieldValue.serverTimestamp()没有任何价值.

However, please note that when you haven't synced with Firestore yet FieldValue.serverTimestamp() gives nothing of value.

只有在与Firestore同步并再次获取数据之后，道具才会从serverTimestamp→更改为Timestamp

Only after you have synced with Firestore and the data is fetched again, the prop will be changed from serverTimestamp → to Timestamp

您还将看到保存在Timestamp对象中的更多信息:

You'll also see much more information saved in a Timestamp object:

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