Is there any way to handle broken images? about echo HOT 1 OPEN

echo.init({
      offset: 1000,
      throttle: 10,
      debounce: false,
      unload: false,
      callback: function(element, op) {
        element.onerror = function() {
          var ele = element;
          var notFoundClass = 'image-404';
          if (ele.className.indexOf(notFoundClass) == -1) {
            ele.src = 'data:image/png;base64,';
            ele.className = ele.className + ' ' + notFoundClass;
          }
        }
      }
    });