fix slider

components/slider/index.jsx

@@ -85,7 +85,7 @@ export default {
           title: tipFormatter ? tipFormatter(value) : '',
           visible,
           placement: 'top',
-          transitionName: 'zoom-down',
+          transitionName: 'fade',
         },
         key: index,
       }

components/vc-slider/src/Handle.jsx

@@ -3,8 +3,6 @@ import addEventListener from '../../_util/Dom/addEventListener'
 import BaseMixin from '../../_util/BaseMixin'
 import { getOptionProps } from '../../_util/props-util'
 
-function noop () {}
-
 export default {
   name: 'Handle',
   mixins: [BaseMixin],

components/vc-slider/src/createSliderWithTooltip.jsx

@@ -51,11 +51,11 @@ export default function createSliderWithTooltip (Component) {
 
         const tooltipProps = {
           props: {
+            ...restTooltipProps,
             prefixCls,
             overlay,
             placement,
             visible: (!disabled && (this.visibles[index] || dragging)) || visible,
-            ...restTooltipProps,
           },
           key: index,
         }