Google RateLimiter not Working for counter

it fixes the issue Sharded counters will have exactly the same problem - if you can call it that - that the built in autogenerated IDs have: they don't guarantee monotonicity. Sharded counters are designed to allow you to count things, not to allow you to assign numbers to things; as a result, you can't transactionally get the sum of all the shards, and your result is wrong.
You really should just use the built in autonumbering; I doubt users pay serious attention to the magnitude of bug numbers with respect to each other, and most solutions you can come up with will have similar issues if you want them to scale to high write rates.

Hope this helps You seem to be getting the count right. So the only problems left I guess are:
Getting max count Displaying it in bold

var vowels = new Array ();
vowels [0] = {"vowel" : "A", "count" : countA};
vowels [1] = {"vowel" : "E", "count" : countE};
vowels [2] = {"vowel" : "I", "count" : countI};
vowels [3] = {"vowel" : "O", "count" : countO};
vowels [4] = {"vowel" : "U", "count" : countU};
var maxCount = Math.max.apply(Math, vowels.map(function(o) {
    return o.count;
}));

for (var i = 0; i < vowels.length; i++) {
    document.getElementById("result").innerHTML += (vowels[i].count == maxCount? "<B>" : "") + vowels[i].vowel + "'s: " + vowels[i].count + "<br />";
}

Hope that helps
I have a problem with the counter value from the Google shortener and my own counter - the value always different. My counter value is always bigger than Google shorter value, is there anything wrong with my own code counter?

will be helpful for those in need There are a few of issues here:
You are disabling the minus button if the plus button is clicked and vice versa because you check the mode in each if statement. The minus button if statement needs to check if the index is > 0 instead of >= 0 Whenever you decrement / increment, you should make sure that the other button is re-enabled so you can go back up / down years.

    $scope.navigateYear=function(year, mode) {
       const index = $scope.yearArray.indexOf(year);

       if (mode === 'plus') {
         if (index >= 0 && index < $scope.yearArray.length - 1) {
               this.year = $scope.yearArray[index + 1];
               $scope.isMinusButtondisabled = false;
          }else{
            $scope.isPlusButtondisabled=true;
          }
       } else if (mode === 'minus') {
         if (index > 0 && index < $scope.yearArray.length) {
              this.year = $scope.yearArray[index - 1];
              $scope.isPlusButtondisabled = false;
          } else{
              $scope.isMinusButtondisabled=true;
          }
       }
    }