Increment and Decrement Firebase Ionic 5

Question

I would like of increment +1 and decrement -1 in database firebase with the simple method

increment() {
  const i = +1;
  this.service.update(i)
}


decrement() {
  const i = -1;
  this.service.update(i)
}

and service I have the simple code

update(panel: Panel) {
return this.db.object(`${this.path}/${panel.codeLed}`)
    .update(panel);
}

Answer 1

I found this code and to me, worked fine

incrementUp(panel: Panel) {
   return this.db.object(`${this.path}/${panel.codeLed}/up`)
    .query.ref.transaction(ups => {
      if (ups === null) {
        return ups = 1;
      } else {
        return ups + 1;
      }
    });
}