Firebase new Date（）？ [英] Firebase new Date()?

问题描述

我是Firebase的新手，我想知道如何存储JavaScript日期，然后使用Firebase在客户端进行比较？

I'm new to Firebase and I was wondering how I can store a JavaScript date and use Firebase to compare them on the client side later?

我想请执行以下操作：

var someDate = new Date();
myRootRef.set(someDate);

myRootRef.on('value', function(snapshot) {
     var currDate = new Date();
if (currDate >=  snapshot.val()){
     //do something
}

但是，我收回一个

推荐答案

您还可以使用时间戳。 c> / p>

You can also use timestamp.

var timestamp = new Date().getTime();
myRootRef.set(timestamp);

myRootRef.on('value', function(snapshot) {
    var currDate = new Date();
    var snapshotTimestamp = snapshot.val();

    //you can operate on timestamps only...
    console.log("Snapshot timestamp: " + snapshotTimestamp);

    if(currDate.getTime() >= snapshotTimestamp) {
        //do something
    }

    //...or easily create date object with it  
    console.log("Snapshot full date: " + new Date(snapshotTimestamp));

    if (currDate >=  new Date(snapshotTimestamp)){
        //do something
    }

});

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