How to get keys length found in Ionic2 Storage (IndexedDB)

Question

I am trying to use Ionic2 Storage , which use Indexed DB on browser. How can I get total number of keys in storedin DB.

this._storage.length() gives me t {__zone_symbol__state: null, __zone_symbol__value: Array[0]}

Answer 1

I got the answer, this._storage.length() returns promise

  this._storage.length().then((data) => {
    console.log(data);
  })