Промисы

let myArray = [1,3,23,5,6,7,8,8];
let myCounter = 1;

function myPromise() {
    return new Promise((resolve, reject) => {

        try {


            fetch('https://test-site.ru')
            .then((response) => {
                return response.text();
            })
            .then((data) => {
                resolve(myCounter+=1);
            });


        }
        catch (err) {
            reject(err);
        }
    });
};

function testPromise() {
    myPromise().then((myCounter) => {

        if (myArray.length>myCounter) {
            setTimeout(function(){
                testPromise();
            }, 500)
        };
    });
};

testPromise();