数天直到今天moment.js [英] Count days until today moment.js

问题描述

我有一个功能，可以获得直到今天的天数。但它工作正常，我使用moment.js来编写和格式化JSON数据的日期，我认为这会导致冲突。有没有办法用moment.js做同样的事情？

I have a function that gets the number of days until today. It works however, I am using moment.js to write and format the date from JSON data and I think it is causing a conflict. Is there a way to do the same thing using moment.js?

这是有效的JavaScript： http://jsfiddle.net/infatti/XeqPT/

This is the working JavaScript: http://jsfiddle.net/infatti/XeqPT/

// Count days due
function daysUntil(year, month, day) {
  var now = new Date(),
      dateEnd = new Date(year, month - 1, day), // months are zero-based
      days = (dateEnd - now) / 1000/60/60/24;   // convert milliseconds to days

  return Math.round(days);
}

如何使用moment.js完成同样的事情？

How can the same thing be done using moment.js?

如果有兴趣的话，这就是我在不工作日期的方式。

If interested, here is how I am pulling in the date when it does not work.

<span class="due-date" data-bind="textualDate: DueDate"></span>

ko.bindingHandlers.textualDate = {
    update: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
        var valueUnwrapped = ko.utils.unwrapObservable(valueAccessor());
        var textContent = moment(valueUnwrapped).format("MM/DD/YYYY");
        ko.bindingHandlers.text.update(element, function () { return textContent; });
    }
};

推荐答案

如果您遇到的问题是使用 moment.js 获取两个日期之间的持续时间，然后您可以使用 diff 这样的函数：

If the problem you have is to use moment.js to get the duration between two dates, then you can use the diff function like this:

var a = moment([2007, 0, 29]);
var b = moment([2007, 0, 28]);
var diffInMs = a.diff(b); // 86400000 milliseconds
var diffInDays = a.diff(b, 'days'); // 1 day

现在，我不知道你是否对KnockoutJS有任何问题，但是这个应该确保你的计算是用 moment.js 完成的。

Now, I don't know if you have any problem with KnockoutJS, but this should ensure that your computation is done with moment.js.

为了你的兴趣，我自己做了一个自定义绑定处理程序来显示片刻日期前一段时间。与你的不同之处在于我的观察力已经是一个时刻的对象。所以，我在这里对其进行了修改以使其适用于标准日期对象：

Just for your interest, I made myself a custom binding handler for displaying a moment date some time ago. The difference with yours is that my observable was already a moment object. So, I've modified it down here to make it work with standard date objects:

    ko.bindingHandlers.moment = {
        update: function(element, valueAccessor) {
            var value = valueAccessor();
            var formattedValue = moment(ko.utils.unwrapObservable(value)).format('MM/DD/YYYY');
            $(element).text(formattedValue);
        }
    };

编辑：我给你一个小提示示例。

I made you a fiddle with the example.

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