angular应用内的input在设置了maxlength的情况下输满后选中会无法修改

'use strict';
export default function () {
  return {
    restrict: 'A',
    link: function ($scope, $element, $attributes) {

      var limit = $attributes.maxlength;
      $element.bind('keyup', function (event) {
        var element = $($element).closest('.form-group');

        element.toggleClass('has-warning', limit - $element.val().length <= 10);
        element.toggleClass('has-error', $element.val().length >= limit);
      });

      $element.bind('keypress', function (event) {
        // Once the limit has been met or exceeded, prevent all keypresses from working
        if ($element.val().length >= limit) {
          // Except backspace
          if (event.keyCode !== 8) {
            event.preventDefault();
          }
        }
      });
    }
  };
}

谢谢大家的帮助。

经过反复排查，发现是一个第三方指令将maxlength重新定义了