Fix the #34 issue [2];

First approach was incorrect;
ToDo: cover custom renderers with tests.

Author: xobotyi

dist/Thumb.js

@@ -13,10 +13,12 @@ var _Track = _interopRequireDefault(require("./Track"));
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
-function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
-
 function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
 
+function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
+
 function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
 
 function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
@@ -160,12 +162,16 @@ function (_React$Component) {
       props.className = "thumb " + (type === TYPE_X ? "thumbX" : "thumbY") + (className ? " " + className : "");
       props.onMouseDown = this.handleDragStart;
 
-      props.ref = function (ref) {
-        typeof elementRef === "function" && elementRef(ref);
-        _this2.element = ref;
+      var ref = function ref(_ref) {
+        typeof elementRef === "function" && elementRef(_ref);
+        _this2.element = _ref;
       };
 
-      return renderer ? renderer(props) : _react.default.createElement("div", props);
+      return renderer ? renderer(_objectSpread({}, props, {
+        elementRef: ref
+      })) : _react.default.createElement("div", _extends({}, props, {
+        ref: ref
+      }));
     }
   }]);
 

dist/Track.js

@@ -13,6 +13,10 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 
 function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
 
+function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
+
 function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
 
 function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
@@ -84,12 +88,16 @@ function (_React$Component) {
       props.className = "track " + (type === TYPE_X ? "trackX" : "trackY") + (className ? " " + className : "");
       props.onClick = this.onClickHandler;
 
-      props.ref = function (ref) {
-        typeof elementRef === "function" && elementRef(ref);
-        _this2.element = ref;
+      var ref = function ref(_ref) {
+        typeof elementRef === "function" && elementRef(_ref);
+        _this2.element = _ref;
       };
 
-      return renderer ? renderer(props) : _react.default.createElement("div", props);
+      return renderer ? renderer(_objectSpread({}, props, {
+        elementRef: ref
+      })) : _react.default.createElement("div", _extends({}, props, {
+        ref: ref
+      }));
     }
   }]);
 

src/Thumb.js

@@ -109,11 +109,19 @@ export default class Thumb extends React.Component {
 
         props.className = "thumb " + (type === TYPE_X ? "thumbX" : "thumbY") + (className ? " " + className : "");
         props.onMouseDown = this.handleDragStart;
-        props.ref = ref => {
+
+        const ref = ref => {
             typeof elementRef === "function" && elementRef(ref);
             this.element = ref;
         };
 
-        return renderer ? renderer(props) : <div {...props} />;
+        return renderer ? (
+            renderer({
+                ...props,
+                elementRef: ref,
+            })
+        ) : (
+            <div {...props} ref={ref} />
+        );
     }
 }

src/Track.js

@@ -39,11 +39,19 @@ export default class Track extends React.Component {
 
         props.className = "track " + (type === TYPE_X ? "trackX" : "trackY") + (className ? " " + className : "");
         props.onClick = this.onClickHandler;
-        props.ref = ref => {
+
+        const ref = ref => {
             typeof elementRef === "function" && elementRef(ref);
             this.element = ref;
         };
 
-        return renderer ? renderer(props) : <div {...props} />;
+        return renderer ? (
+            renderer({
+                ...props,
+                elementRef: ref,
+            })
+        ) : (
+            <div {...props} ref={ref} />
+        );
     }
 }