text: var $ = require('jquery');
  
  var alertDialog;
  var confirmDialog;
  var handleConfirm;
  
  function createAlert() {
    if (!alertDialog) {
      alertDialog = $(
        '<div class="modal fade w-win-dialog" tabindex="-1" role="dialog">' +
          '<div class="modal-dialog" role="document">' +
          '<div class="modal-content">' +
          '<div class="modal-body">' +
          '<pre class="alert alert-danger"></pre>' +
          '</div>' +
          '<div class="modal-footer">' +
          '<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>' +
          '</div>' +
          '</div>' +
          '</div>' +
          '</div>'
      );
    }
    return alertDialog;
  }
  
  function createConfirm() {
    if (!confirmDialog) {
      confirmDialog = $(
        '<div class="modal fade w-win-dialog" tabindex="-1" role="dialog">' +
          '<div class="modal-dialog" role="document">' +
          '<div class="modal-content">' +
          '<div class="modal-body">' +
          '<pre></pre>' +
          '</div>' +
          '<div class="modal-footer">' +
          '<button type="button" class="btn btn-default w-win-cancel" data-dismiss="modal">Cancel</button>' +
          '<button type="button" class="btn btn-primary w-win-confirm" data-dismiss="modal">Confirm</button>' +
          '</div>' +
          '</div>' +
          '</div>' +
          '</div>'
      );
      confirmDialog.on('click', '.w-win-cancel', function () {
        if (typeof handleConfirm === 'function') {
          handleConfirm(false);
        }
        handleConfirm = null;
      });
      confirmDialog.on('click', '.w-win-confirm', function () {
        if (typeof handleConfirm === 'function') {
          handleConfirm(true);
        }
        handleConfirm = null;
      });
    }
    return confirmDialog;
  }
  
  function mockAlert(msg) {
    createAlert();
    alertDialog.find('pre').text(msg);
    alertDialog.modal('show');
  }
  
  function mockConfirm(msg, cb) {
    createConfirm();
    if (confirmDialog.is(':visible')) {
      return;
    }
    handleConfirm = cb;
    confirmDialog.find('pre').text(msg);
    confirmDialog.modal('show');
  }
  
  exports.alert = mockAlert;
  exports.confirm = mockConfirm;
  