--- /dev/null
+'use strict';
+
+function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
+
+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) : _defaults(subClass, superClass); }
+
+var flexSpec = require('./flex-spec');
+var Declaration = require('../declaration');
+
+var Flex = function (_Declaration) {
+ _inherits(Flex, _Declaration);
+
+ function Flex() {
+ _classCallCheck(this, Flex);
+
+ return _possibleConstructorReturn(this, _Declaration.apply(this, arguments));
+ }
+
+ /**
+ * Return property name by final spec
+ */
+ Flex.prototype.normalize = function normalize() {
+ return 'flex';
+ };
+
+ /**
+ * Return flex property for 2009 and 2012 specs
+ */
+
+
+ Flex.prototype.prefixed = function prefixed(prop, prefix) {
+ var spec = void 0;
+
+ var _flexSpec = flexSpec(prefix);
+
+ spec = _flexSpec[0];
+ prefix = _flexSpec[1];
+
+ if (spec === 2009) {
+ return prefix + 'box-flex';
+ } else if (spec === 2012) {
+ return prefix + 'flex-positive';
+ } else {
+ return _Declaration.prototype.prefixed.call(this, prop, prefix);
+ }
+ };
+
+ return Flex;
+}(Declaration);
+
+Object.defineProperty(Flex, 'names', {
+ enumerable: true,
+ writable: true,
+ value: ['flex-grow', 'flex-positive']
+});
+
+
+module.exports = Flex;
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