基本的javascript方式：

var d1 = new Date('01/16/2013');
var d2 = new Date('02/26/2013');
var milliseconds = d2-d1;
var seconds = milliseconds / 1000;
var minutes = seconds / 60;
var hours = minutes / 60;
var days = hours / 24;

使用其中一个日期库（如moment.js）：

var d1 = moment("01/16/2013");
var d2 = moment("02/26/2013");
var days = moment.duration(d2.diff(d1)).asDays();

您只需将日期转换为时间戳，然后相减即可。

var Date1 = 08/16/2004;
var Date2= 10/24/2005;

var timestamp1 = new Date(Date1).getTime();
var timestamp2 = new Date(Date2).getTime();

var diff = timestamp1 - timestamp2

var newDate = new Date (diff);

您可以使用angular-moment计算差异，使用amDifference过滤器：
获取两个日期之间的差值（以毫秒为单位）。参数为date、units和usePrecision。Date默认为当前日期。示例：

<span>Difference: {{ dateFrom | amDifference : dateTo : 'days' }} days</span>

我也是angularjs的新手，但是你不会通过javascript视图模型提供属性来解决这个问题吗？
例如，有一个基于日期字段更改的 * style * 字段（即，如果差异为10天，则style返回style 1），并希望通过angularjs绑定将更新传播到屏幕。
我认为正确的术语是 * 计算属性 * 或 * 计算属性 *

• 编辑 *

不确定这是否是你要找的，但是看看fiddle的例子，计算日期差异和改变样式都是基于视图模型的属性（作用域）
scope.diff和scope.col是要绑定到的2个属性
http://jsfiddle.net/chrismoutray/wfjv6/
超文本标记语言

<script src="http://code.angularjs.org/0.10.4/angular-0.10.4.min.js" ng:autobind></script>
<div ng:controller="ComputedPropertiesCtrl">
    first date <input ng:model="firstdate"> second date <input ng:model="seconddate"> difference {{diff}}
    <div>when the difference is greater than 10 color changes to green</div>
    <div>eg set the second date to 15/01/2013</div>
    <div style="background-color:{{col}};"> State </div>
</div>

JS系统

function ComputedPropertiesCtrl() {
    var scope = this;
    scope.firstdate = '01/01/2013';
    scope.seconddate = '10/01/2013';
    scope.data_before = [];
    scope.differenceInDays = function() {

        var dt1 = scope.firstdate.split('/'),
            dt2 = scope.seconddate.split('/'),
            one = new Date(dt1[2], dt1[1]-1, dt1[0]),
            two = new Date(dt2[2], dt2[1]-1, dt2[0]);

        var millisecondsPerDay = 1000 * 60 * 60 * 24;
        var millisBetween = two.getTime() - one.getTime();
        var days = millisBetween / millisecondsPerDay;

        return Math.floor(days);      
    };
    scope.color = function() {
        return (scope.differenceInDays() > 10) ? 'green' : 'red';
    };

    scope.$watch('[firstdate, seconddate]', function(currScope,newVal,oldVal) {
        scope.data_before = oldVal;
        scope.diff = scope.differenceInDays();
    });

    scope.$watch('[firstdate, seconddate]', function(currScope,newVal,oldVal) {
        scope.data_before = oldVal;
        scope.col = scope.color();
    });
}

中央支助系统

h2 { position: fixed; right: 10px; top: 10px; color: red; background:white;z-index:1000; }
input { width: 100px; }
div { margin: 10px; padding: 10px; }

这是可行的，这里有2个完美的javascript日期函数，你永远不应该没有...

// Returns the days between a & b date objects...
function dateDiffInDays(a, b) {
    var _MS_PER_DAY = 1000 * 60 * 60 * 24;
    // Discard the time and time-zone information.
    var utc1 = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate());
    var utc2 = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate());
    return Math.floor((utc2 - utc1) / _MS_PER_DAY);
}

// Calculate how many days between now and an event...
function daysTill(e) {
    var eventE = new Date(e);
    var today =  new Date();
    return dateDiffInDays(today, eventE);
}

JavaScript库非常有用且易于用途：

var parsedServerOutTime = moment(serverOutTime, "HH:mm:ss");
var parsedServerInTime = moment(serverInTime, "HH:mm:ss");

var milliseconds= parsedServerOutTime.diff(parsedServerInTime) //default milliseconds
var days = moment.duration(parsedServerOutTime .diff(parsedServerInTime )).asDays();// For days

asWeeks();asMonths();asYears();等有关详细信息，请查看http://momentjs.com/docs/

我试着用这个来计算总天数。天数是从日期到日期计算的。所以，默认情况下，到日期是指当前日期。

angular.module('myApp', [])
  .controller('myCtrl', ['$scope', function($scope) {
    $scope.myFunc = function() {
      var reqDate = $scope.reqDate;
      let cDate = new Date();
      let reqSent = new Date(reqDate);
      var from = Date.UTC(cDate.getFullYear(), cDate.getMonth(),                    cDate.getDate());
      var to = Date.UTC(reqSent.getFullYear(), reqSent.getMonth(),                  reqSent.getDate());
      let day = Math.floor((from - to) /(1000 * 60 * 60 * 24));
      $scope.day = day; 
    };
  }]);

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.0.1/angular.min.js"></script>

<div ng-app="myApp" >
<div ng-controller="myCtrl">
    <input type='date' ng-model="reqDate" id="reqDate">
    <br />

<button ng-click="myFunc()" style="margin-top:10px;margin-bottom:10px"> Click </button> 
<br />
<b> Total Days :  {{day}}</b> 
</div>
</div>

我尝试了下面的一个，它为我工作

var selecteddate = new Date($rootscope.selectvalue);
$scope.firstDate = selecteddate .getTime();
$scope.SecondDate = new Date().getTime();

选定的日期是从日历中选定的日期，它来自父范围。第二个日期将是今天的日期。稍后我将使用时间差查找差异。

var differenceinDays=parseInt(
      moment.duration(
        moment($scope.firstDate).diff(
          moment($scope.SecondDate)
        )
      ).asDays()
    );

我使用parseInt是因为我只想返回整数值
希望这能管用