HTTP so'rov sarlavhalari AJAX orqali JavaScriptda

headers sozlami yordamida HTTP so'rov sarlavhalarini uzatish mumkin:

public/client.jsbutton.addEventListener('click', function() {
  let promise = fetch('/handler/', {
    headers: {
      name1: 'value1',
      name2: 'value2',
    }
  });
});