How to get all contacts and count contact numbers from mobile in cordova?

Get  all contacts and count contact numbers from mobile in cordova.

document.addEventListener("deviceready", jaspreet, false);

function jaspreet() {

   //

   //

   // after deviceready

   //

   //

   navigator.contactsPhoneNumbers.list(function(contacts) {

      console.log(contacts.length + ' contacts found');

  alert(contacts.length);

      for(var i = 0; i < contacts.length; i++) {

         console.log(contacts[i].id + " - " + contacts[i].displayName);

         for(var j = 0; j < contacts[i].phoneNumbers.length; j++) {

            var phone = contacts[i].phoneNumbers[j];

            console.log("===> " + phone.type + "  " + phone.number + " (" + phone.normalizedNumber+ ")");

document.getElementById("names").innerHTML +=phone.type + "  " + phone.number;

         }

      }

   }, function(error) {

      console.error(error);

   });

   

}