angularjs moment parse format

Question

I have a ng-repeat that display the following expression

{{date}} // 2-1-2017

When I use angular-moment

{{date | amDateFormat:'DD'}} 

I got 1, which I'm expecting 2. how to make moment know my format is actually dd-mm-yyyy not mm-dd-yyy in the view? I don't want to parse it at my controllers level as it's complicated.

Perspicacity

What is the type of date variable (date, sting, moment object)? Do you have warning in the console? – Disraeli

Answer 1

According to the docs, AngularJs has a built-in filter for date which can be used with the following set:

{{ date_expression | date : format : timezone}}

So that you can use it like:

{{ date | date:'dd-MM-yyyy'}}

However if you use moment's date filter, it has to be a moment date (i.e., complete date with timezone defined) object and you can filter it in the same way that angular does.

{{ date | amDateFormat:'dd-MM-yyyy' }}

Rimola

I want to display the date only, like 2. – Perspicacity

You mean I use angularjs date filter to format and do something with moment? – Perspicacity

@JessieEmerson You can use de format argument as 'dd' so btu actually you may have problems with your date object and how you are parsing its format. – Rimola

the date is a string actually. – Perspicacity

@JessieEmerson what about date = new Date('2-1-2017');? – Rimola

Where should I put that? in controller? I don't want to touch controller, there are bunch of dates coming from there, and it's nested. – Perspicacity

@JessieEmerson please take a look at my updated answer that uses amParse filter without modifying the controller. – Disraeli

Answer 2

You can use angular built-in filter for date (as suggested in other answers), if your input is:

• a JavaScript Date object
• a number that represents milliseconds (this can be also a string)
• a string in ISO 8601 format (e.g. yyyy-MM-ddTHH:mm:ss.sssZ, yyyy-MM-dd etc)

---

Your date is a string with a format that is not ISO 8601, so you have to change the way you parse 2-1-2017 into a date.

You can parse your string in your controller using moment(String, String) as shown in the following example:

angular.module('MyApp',['angularMoment'])
.controller('AppCtrl', function($scope) {
  $scope.dates = [
    // Wrong way to parse string
    moment('2-1-2017').toDate(),
    // Parse string specifying format
    moment('2-1-2017', 'D-M-YYYY').toDate()
  ];
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.9/angular.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-moment/1.0.1/angular-moment.min.js"></script>

<div ng-app="MyApp" ng-controller="AppCtrl">
  <div ng-repeat="date in dates">
    <span>angular-moment: {{date | amDateFormat:'DD'}}</span>
    <span>angular date filter: {{date | date:"dd"}}</span>
  </div>
</div>

If you don't want to modify your controller you can use angular moment amParse filter. As the docs says, this filter:

Parses a custom-formatted date into a moment object that can be used with the am-time-ago directive and the other filters.

So in your case, you can use the code shown in the following example:

angular.module('MyApp',['angularMoment'])
.controller('AppCtrl', function($scope) {
  $scope.dates = [
    '2-1-2017', // February 2 2017
    '15-1-2017' // January 15 2017
  ];
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.9/angular.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-moment/1.0.1/angular-moment.min.js"></script>

<div ng-app="MyApp" ng-controller="AppCtrl">
  <div ng-repeat="date in dates">
    <span>angular-moment: {{date | amParse:'D-M-YYYY' | amDateFormat:'DD'}}</span>
  </div>
</div>

Disraeli

Answer 3

I think your problem could be related in how you build your date object

new Date("2-1-2017") ; // Wed Feb 01 2017

If I do this, 1 refers to the day, which is correct. The date filter parse the date based on the object it receive, you should look for a correct Date format for your input date.

Socialization

Answer 4

You should use the angular filter, like:

{{date | date:'dd-MM-yyyy'}}

Athabaska