text: 'use strict';
  
  exports.__esModule = true;
  exports.getStyle = exports.once = exports.off = exports.on = undefined;
  
  var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; /* istanbul ignore next */
  
  exports.hasClass = hasClass;
  exports.addClass = addClass;
  exports.removeClass = removeClass;
  exports.setStyle = setStyle;
  
  var _vue = require('vue');
  
  var _vue2 = _interopRequireDefault(_vue);
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  
  var isServer = _vue2.default.prototype.$isServer;
  var SPECIAL_CHARS_REGEXP = /([\:\-\_]+(.))/g;
  var MOZ_HACK_REGEXP = /^moz([A-Z])/;
  var ieVersion = isServer ? 0 : Number(document.documentMode);
  
  /* istanbul ignore next */
  var trim = function trim(string) {
    return (string || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
  };
  /* istanbul ignore next */
  var camelCase = function camelCase(name) {
    return name.replace(SPECIAL_CHARS_REGEXP, function (_, separator, letter, offset) {
      return offset ? letter.toUpperCase() : letter;
    }).replace(MOZ_HACK_REGEXP, 'Moz$1');
  };
  
  /* istanbul ignore next */
  var on = exports.on = function () {
    if (!isServer && document.addEventListener) {
      return function (element, event, handler) {
        if (element && event && handler) {
          element.addEventListener(event, handler, false);
        }
      };
    } else {
      return function (element, event, handler) {
        if (element && event && handler) {
          element.attachEvent('on' + event, handler);
        }
      };
    }
  }();
  
  /* istanbul ignore next */
  var off = exports.off = function () {
    if (!isServer && document.removeEventListener) {
      return function (element, event, handler) {
        if (element && event) {
          element.removeEventListener(event, handler, false);
        }
      };
    } else {
      return function (element, event, handler) {
        if (element && event) {
          element.detachEvent('on' + event, handler);
        }
      };
    }
  }();
  
  /* istanbul ignore next */
  var once = exports.once = function once(el, event, fn) {
    var listener = function listener() {
      if (fn) {
        fn.apply(this, arguments);
      }
      off(el, event, listener);
    };
    on(el, event, listener);
  };
  
  /* istanbul ignore next */
  function hasClass(el, cls) {
    if (!el || !cls) return false;
    if (cls.indexOf(' ') !== -1) throw new Error('className should not contain space.');
    if (el.classList) {
      return el.classList.contains(cls);
    } else {
      return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
    }
  };
  
  /* istanbul ignore next */
  function addClass(el, cls) {
    if (!el) return;
    var curClass = el.className;
    var classes = (cls || '').split(' ');
  
    for (var i = 0, j = classes.length; i < j; i++) {
      var clsName = classes[i];
      if (!clsName) continue;
  
      if (el.classList) {
        el.classList.add(clsName);
      } else if (!hasClass(el, clsName)) {
        curClass += ' ' + clsName;
      }
    }
    if (!el.classList) {
      el.className = curClass;
    }
  };
  
  /* istanbul ignore next */
  function removeClass(el, cls) {
    if (!el || !cls) return;
    var classes = cls.split(' ');
    var curClass = ' ' + el.className + ' ';
  
    for (var i = 0, j = classes.length; i < j; i++) {
      var clsName = classes[i];
      if (!clsName) continue;
  
      if (el.classList) {
        el.classList.remove(clsName);
      } else if (hasClass(el, clsName)) {
        curClass = curClass.replace(' ' + clsName + ' ', ' ');
      }
    }
    if (!el.classList) {
      el.className = trim(curClass);
    }
  };
  
  /* istanbul ignore next */
  var getStyle = exports.getStyle = ieVersion < 9 ? function (element, styleName) {
    if (isServer) return;
    if (!element || !styleName) return null;
    styleName = camelCase(styleName);
    if (styleName === 'float') {
      styleName = 'styleFloat';
    }
    try {
      switch (styleName) {
        case 'opacity':
          try {
            return element.filters.item('alpha').opacity / 100;
          } catch (e) {
            return 1.0;
          }
        default:
          return element.style[styleName] || element.currentStyle ? element.currentStyle[styleName] : null;
      }
    } catch (e) {
      return element.style[styleName];
    }
  } : function (element, styleName) {
    if (isServer) return;
    if (!element || !styleName) return null;
    styleName = camelCase(styleName);
    if (styleName === 'float') {
      styleName = 'cssFloat';
    }
    try {
      var computed = document.defaultView.getComputedStyle(element, '');
      return element.style[styleName] || computed ? computed[styleName] : null;
    } catch (e) {
      return element.style[styleName];
    }
  };
  
  /* istanbul ignore next */
  function setStyle(element, styleName, value) {
    if (!element || !styleName) return;
  
    if ((typeof styleName === 'undefined' ? 'undefined' : _typeof(styleName)) === 'object') {
      for (var prop in styleName) {
        if (styleName.hasOwnProperty(prop)) {
          setStyle(element, prop, styleName[prop]);
        }
      }
    } else {
      styleName = camelCase(styleName);
      if (styleName === 'opacity' && ieVersion < 9) {
        element.style.filter = isNaN(value) ? '' : 'alpha(opacity=' + value * 100 + ')';
      } else {
        element.style[styleName] = value;
      }
    }
  };