fetchAll method working fine with closure

fetchAllWithVarWithClosure.js

function fetchData(url, c) {
  console.log("url====", url);
  setTimeout(function () {
    console.log("===in fetchdata callback for url===", url);
    return c("response" + url);
  }, 100 * url.length);
}

function fetchAll(urls, callback) {
  /* responsesArray contains reponses index wise*/
  let responsesArray = [];

  /* callbacksCount contains hom many times the callback has been called */
  let callbacksCount = 0;
  
  var callbackFunctionAfterFetch= function(i) {
     return function (response) {
          if (response) {
            responsesArray[i] = response;
            console.log("resolved url --->", urls[i]);
            callbacksCount++;

            if (callbacksCount === urls.length) {
              callback(responsesArray);
            }
          }
        };
  }

  for (var i = 0; i < urls.length; i++) {
    fetchData(urls[i], callbackFunctionAfterFetch(i));
  }
}

fetchAll(["ar", "brty", "c"], function (responses) {
  console.log("responses are ------> ", responses);
});