How to create a cvs file from a JSON array

Hi,
Thank you for your answer.
I tried your solution. I can't say It doesn't work because my button doesn't trigger anything.

This is my formula :

<ion-item ng-click="onSelectExport()">
          <i class="current-value">CSV Export</i>
</ion-item>

Do you know what should I do to make this csv object downloadable ??