Firestore Fieldvalue Increment With Nested Object And Variable Field-name Not Working

I understand to use Firestore FieldValue increment function in the nested object I need to mention the completed path in the update method. My Ionic 5 project's main method takes t

Solution 1:

This should work:

this.afs.doc('path').update({
   ["count." + attr]: firebase.firestore.FieldValue.increment(1);
});