Im trying checking if a value is a date like this:

var input = "2014-04-01T15:22:30.000Z";

var dateTime = {
    year: $filter('date')(input,'yyyy'),
    day: $filter('date')(input,'EEE'),
    dayNum: $filter('date')(input,'d'),
    month: $filter('date')(input,'MMM'),
    hours:$filter('date')(input,'H'),
    mins: $filter('date')(input,'m'),
    seconds:$filter('date')(input,'ss')
};

if(angular.isDate(dateTime.year+' '+dateTime.month+' '+dateTime.dayNum)) { 
    // always false 
}

why is always false?

The year,month etc pieces are correctly filtered :/

Im trying checking if a value is a date like this:

var input = "2014-04-01T15:22:30.000Z";

var dateTime = {
    year: $filter('date')(input,'yyyy'),
    day: $filter('date')(input,'EEE'),
    dayNum: $filter('date')(input,'d'),
    month: $filter('date')(input,'MMM'),
    hours:$filter('date')(input,'H'),
    mins: $filter('date')(input,'m'),
    seconds:$filter('date')(input,'ss')
};

if(angular.isDate(dateTime.year+' '+dateTime.month+' '+dateTime.dayNum)) { 
    // always false 
}

why is always false?

The year,month etc pieces are correctly filtered :/

• javascript
• string
• angularjs
• date

Share Improve this question Follow edited Apr 10, 2014 at 22:08 tshepang 12.5k2525 gold badges9898 silver badges139139 bronze badges asked Apr 8, 2014 at 13:35 Filippo orettiFilippo oretti 49.9k9696 gold badges229229 silver badges351351 bronze badges

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2 Answers 2

Sorted by: Reset to default 5

The following statement is always false, maybe your assumption about how isDate works is incorrect?

angular.isDate('2014 Mar 1');

Here's the source code for the isDate function. You'll see that it checks whether the supplied value is a javascript Date object.

function isDate(value){
  return toString.call(value) === '[object Date]';
}

You might wonder why angular allows you to do the following:

var input = "2014-04-01T15:22:30.000Z";
var year = $filter('date')(input,'yyyy');

It's because the date filter actually converts your input into a date before returning a formatted copy. So, with the date filter, it lets you pass in a string, but the isDate function requires a Date object.

dateTime.year+' '+dateTime.month+' '+dateTime.dayNum is a string, not a date object.