Firebase新日期()？

Question

我是Firebase的新手,我想知道如何存储JavaScript日期并使用Firebase稍后在客户端进行比较？

我想做的事情如下:

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null从快照中获取了一个值？

Answer 1

您还可以使用时间戳.

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
    }

});