var getJSON = function(url) { return new Promise(function(resolve, reject) { var xhr = new XMLHttpRequest(); xhr.open('get', url, true); xhr.responseType = 'json'; xhr.onload = function() { var status = xhr.status; if (status == 200) { resolve(xhr.response); } else { reject(status); } }; xhr.send(); }); }; var i = 0; setInterval(function() { getJSON('http://www.lazada.com.my/ajax/lottery/spinTheWheel/?lang=en&platform=desktop&wheelToken=b5dd7e9dcbde84b3e11a9ae90d377b02&dpr=2').then(function(data) { i++; if(data.data.voucherCode) { console.log('Voucher: ' + data.data.voucherCode); alert('Voucher: ' + data.data.voucherCode); } else { console.log('no voucher'); } document.getElementsByClassName("breadcrumb__item-text")[1].innerHTML = 'Help Center on Lazada Malaysia - Spins: ' + i; }); }, 1000); 442