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lines changed Original file line number Diff line number Diff line change @@ -30,13 +30,7 @@ export const BackTop: FunctionComponent<
3030 }
3131 const classPrefix = 'nut-backtop'
3232 const [ backTop , SetBackTop ] = useState ( false )
33- const cls = classNames (
34- classPrefix ,
35- {
36- show : backTop ,
37- } ,
38- className
39- )
33+ const cls = classNames ( classPrefix , { show : backTop } , className )
4034 // 监听用户滑动页面事件
4135 usePageScroll ( ( res ) => {
4236 const { scrollTop } = res
Original file line number Diff line number Diff line change @@ -51,13 +51,7 @@ export const BackTop: FunctionComponent<
5151 const [ scrollTop , SetScrollTop ] = useState ( 0 )
5252 let startTime = 0
5353 const scrollEl = useRef < any > ( null )
54- const cls = classNames (
55- classPrefix ,
56- {
57- show : backTop ,
58- } ,
59- className
60- )
54+ const cls = classNames ( classPrefix , { show : backTop } , className )
6155
6256 const scrollListener = useCallback ( ( ) => {
6357 let top = null
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