typescript: replace unknown & any with SliderRef (#42420)

components/slider/index.tsx

@@ -1,12 +1,12 @@
 import classNames from 'classnames';
 import type { SliderProps as RcSliderProps } from 'rc-slider';
 import RcSlider from 'rc-slider';
-import * as React from 'react';
+import type { SliderRef } from 'rc-slider/lib/Slider';
+import React from 'react';
+import warning from '../_util/warning';
 import { ConfigContext } from '../config-provider';
 import type { TooltipPlacement } from '../tooltip';
-import warning from '../_util/warning';
 import SliderTooltip from './SliderTooltip';
-
 import useStyle from './style';
 
 export type SliderMarks = RcSliderProps['marks'];
@@ -97,14 +97,12 @@ interface SliderRange {
 
 export type Opens = { [index: number]: boolean };
 
-const Slider = React.forwardRef<unknown, SliderSingleProps | SliderRangeProps>(
-  (props, ref: any) => {
+const Slider = React.forwardRef<SliderRef, SliderSingleProps | SliderRangeProps>((props, ref) => {
   const {
     prefixCls: customizePrefixCls,
     range,
     className,
     rootClassName,
-
     // Deprecated Props
     tooltipPrefixCls: legacyTooltipPrefixCls,
     tipFormatter: legacyTipFormatter,
@@ -235,8 +233,8 @@ const Slider = React.forwardRef<unknown, SliderSingleProps | SliderRangeProps>(
 
   return wrapSSR(
     <RcSlider
-        {...(restProps as SliderRangeProps)}
-        step={restProps.step!}
+      {...restProps}
+      step={restProps.step}
       range={mergedRange}
       draggableTrack={draggableTrack}
       className={cls}
@@ -245,8 +243,7 @@ const Slider = React.forwardRef<unknown, SliderSingleProps | SliderRangeProps>(
       handleRender={handleRender}
     />,
   );
-  },
-);
+});
 
 if (process.env.NODE_ENV !== 'production') {
   Slider.displayName = 'Slider';