update. Add tipFormat property. See pull #33.

README.md

@@ -148,6 +148,12 @@ ReactDOM.render(<Rcslider />, container);
           <td>''</td>
           <td>Set the animation for tooltip if it shows.</td>
         </tr>
+        <tr>
+          <td>tipFormatter</td>
+          <td>func</td>
+          <td></td>
+          <td>Format the value of the tooltip if it shows.</td>
+        </tr>
         <tr>
           <td>dots</td>
           <td>bool</td>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rc-slider",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "slider ui component for react",
   "keywords": [
     "react",