AngularJS - 两个日期之间的Javascript天数

I have two dates that I get in the following format - that are returned from a web service:

我有两个日期，我得到以下格式 - 从Web服务返回：

var dateone = "2016-08-21T07:00:00.000Z";
var datetwo = "2016-08-28T07:00:00.000Z";
var datediff = datetwo - dateone;
var numdays = Math.round(datediff);
console.log("Number of Days is " + numdays);

I get NaN. What am I missing here?

我得到了NaN。我在这里想念的是什么？

3 个解决方案

#1

Your dateone and datetwo variables are Strings not Dates. Try this:

dateone和datetwo变量是字符串而不是日期。尝试这个：

var dateone = new Date("2016-08-21T07:00:00.000Z"); 
var datetwo = new Date("2016-08-28T07:00:00.000Z");

Also, substracting 2 Dates objects will give you the difference between them in milliseconds, if you want to determine the number of days, you can do something like this:

另外，减去2个日期对象将以毫秒为单位给出它们之间的差异，如果要确定天数，可以执行以下操作：

var dayDif = (datetwo - dateone)  / 1000 / 60 / 60 / 24;

#2

You can easily do with moment.js

你可以轻松地使用moment.js

var a = moment('2016-08-21T07:00:00.000Z');
var b = moment('2016-08-28T07:00:00.000Z'); 
var days = b.diff(a, 'days');

JsFiddle

的jsfiddle

#3

As well as what Titus said about turning them into Dates rather than Strings, try something like this:

除了Titus关于将它们变成日期而不是字符串的内容，请尝试这样的事情：

var oneDay = 24*60*60*1000; // Calculates milliseconds in a day
var diffDays = Math.abs((dateone.getTime() - datetwo.getTime())/(oneDay));

I don't know what you expected Math.round() to do for you, but I don't see that helping much. Math.abs() ensures that the difference is positive, while subtracting the two getTime() functions gets the difference in milliseconds.

我不知道你期望Math.round（）为你做什么，但我不认为这有多大帮助。 Math.abs（）确保差值为正，而减去两个getTime（）函数得到的差值以毫秒为单位。

Hope this helps.

希望这可以帮助。

#1