Ajax exception handler for rails-ujs

AjaxExceptionHandler.js

on('ajax:error', function(e, xhr, status, errors){
  var error;
 
  try {
    error = $.parseJSON(xhr.responseText);
  } catch(e) {
    error = {message: '服务器忙，请稍后再试!'};
  }
 
  //code to show error message
  //$(this).find('.modal-errors').text(error.message);
})