Utilize Angular's date filter on the 'MMMM' option within the ng-options dropdown menu

I have a question regarding my drop-down select functionality. Currently, it shows months by numbers but I would like to change it to display the full month names instead.

Below is the original code snippet:

<select ng-model="month" ng-options="month as month for month in months" ng-change="updateMonth()">
<option value="">Choose Month</option>
</select>

After some experimentation, I tried adding a filter to convert the numbers into month names. However, it ended up displaying all options as 'December' instead of different month names:

<select ng-model="month" ng-options="month as month | date: 'MMMM' for month in months" ng-change="updateMonth()">
<option value="">Choose Month</option>
</select>

The 'months' variable in the JavaScript contains an array from 0 to 11 representing the month numbers.

To clarify,

Initially, the dropdown displays months as follows:

0 1 2 3 4 5 6 7 8 9 10 11

With the added filter, the display changes to:

December December December December December December December December December December December

javascriptangularjs

Answer №1

When the Angular filter date encounters an integer, it is interpreted as a timestamp in milliseconds. The range of milliseconds from 0 to 11 belongs to the same month, resulting in 12 identical month names being displayed. To fix this, create an array of timestamps for each of the 12 months in the current year:

let currentDate = new Date();
// Create an array of timestamps for each of the 12 months
$scope.months = Array.apply(null, Array(12)).map((value, index) => currentDate.setMonth(index));

Now, in your HTML:

<select ng-model="month" 
        ng-options="month as timestamp | date: 'MMMM' for (month, timestamp) in months" 
        ng-change="updateMonth()">
  <option value="">Choose Month</option>
</select>

Check out the Plunker example here: http://plnkr.co/edit/dhAoiRUHzLPlskh1iwKq?p=preview

Answer №2

Sharing my solution in case it helps anyone:

 <select (change)="onChange($event)">
  <option *ngFor="let i of [].constructor(12); let j = index;" value="{{j}}"
          [selected]="j+1 == currentMonth.numberOfMonth">
  {{currentMonth.year + '-' + (j==0?12:j+1) + '-' + '01'|date:'MMMM'}}
  </option>
</select>

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