text: 'use strict';
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
  
  var Declaration = require('../declaration');
  
  var WritingMode = function (_Declaration) {
      _inherits(WritingMode, _Declaration);
  
      function WritingMode() {
          _classCallCheck(this, WritingMode);
  
          return _possibleConstructorReturn(this, _Declaration.apply(this, arguments));
      }
  
      WritingMode.prototype.set = function set(decl, prefix) {
          if (prefix === '-ms-') {
              decl.value = WritingMode.msValues[decl.value] || decl.value;
              return _Declaration.prototype.set.call(this, decl, prefix);
          } else {
              return _Declaration.prototype.set.call(this, decl, prefix);
          }
      };
  
      return WritingMode;
  }(Declaration);
  
  Object.defineProperty(WritingMode, 'names', {
      enumerable: true,
      writable: true,
      value: ['writing-mode']
  });
  Object.defineProperty(WritingMode, 'msValues', {
      enumerable: true,
      writable: true,
      value: {
          'horizontal-tb': 'lr-tb',
          'vertical-rl': 'tb-rl',
          'vertical-lr': 'tb-lr'
      }
  });
  
  
  module.exports = WritingMode;
  