poll.js

function poll() {
  var complete = false;
  $.ajax({
    url: "/api/test",
    type: "GET",
    success: function (data) {
      var message = data.message;
      if (message === 'yes') {
        complete = true;
        status('complete: ' + data.message);
      }
    },
    dataType: "json",
    complete: setTimeout(function () {
      if (!complete) {
        status('polling');
        poll();
      }
    }, 1000),
    timeout: 2000
  });
}