如何在Firebase中检查一天是否已经过去

Question

我已将此时间戳保存在Firestore文档中：

last_check_mmr: 14 dicembre 2021 15:39:01 UTC+1

如何使用Javascript检查一天是否已经过去？

Answer 1

由于您使用云函数，因此使用Dayjs、；解析、验证、操作和显示日期的极简主义JavaScript库；。

使用diff()方法，如下所示应该可以完成任务：

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
const dayjs = require('dayjs');
// Let's imagine you use a scheduled Cloud Funciton
exports.scheduledFunction = functions.pubsub.schedule('...').onRun(async (context) => {
// Get the value of the timestamp, e.g. by fetching a Firestore document

const docRef = ...;
const snap = await docRef.get();
const last_check_mmr = snap.get('last_check_mmr');

const date = dayjs(last_check_mmr.toDate());
const now = dayjs();
console.log(date.diff(now, 'd'));
// If you get a value of 0, it means it is less than a day, if you get -1 or less it is more than a day
if (date.diff(now, 'd') < 0) {
// more than a day
}
return null;
});