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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| import React, { useState, useEffect, useRef, useCallback } from 'react'; | ||
| import { Card, Space } from 'antd'; | ||
| import { Button, Typography } from '@douyinfe/semi-ui'; | ||
| import { formatMs } from '@/utils/index'; | ||
|
|
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| const {Title} = Typography; | ||
|
|
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| const ChronoComponent = () => { | ||
| const [isRunning, setIsRunning] = useState(false); | ||
| const [counter, setCounter] = useState(0); | ||
| const previousRafDateRef = useRef(Date.now()); | ||
| const requestIdRef:any = useRef(null); | ||
|
|
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| const rafCallback = useCallback(() => { | ||
| const deltaMs = Date.now() - previousRafDateRef.current; | ||
| previousRafDateRef.current = Date.now(); | ||
| setCounter((prevCounter) => prevCounter + deltaMs); | ||
| requestIdRef.current = requestAnimationFrame(rafCallback); | ||
| }, []); | ||
|
|
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| useEffect(() => { | ||
| if (isRunning) { | ||
| previousRafDateRef.current = Date.now(); | ||
| requestIdRef.current = requestAnimationFrame(rafCallback); | ||
| } else { | ||
| cancelAnimationFrame(requestIdRef.current); | ||
| } | ||
| }, [isRunning, rafCallback]); | ||
|
|
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| const resume = () => { | ||
| setIsRunning(true); | ||
| }; | ||
|
|
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| const pause = () => { | ||
| setIsRunning(false); | ||
| }; | ||
|
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| const reset = () => { | ||
| setCounter(0); | ||
| setIsRunning(false); | ||
| cancelAnimationFrame(requestIdRef.current); | ||
| }; | ||
|
|
||
| return ( | ||
| <div style={{display:'flex', justifyContent:'center', alignItems:'center',flexDirection:'column'}}> | ||
| <Card style={{width:'50%'}} styles={{body:{display:'flex', justifyContent:'center', alignItems:'center'}}}> | ||
| <Title>{formatMs(counter)}</Title> | ||
| </Card> | ||
| <Space style={{marginTop:'10px'}}> | ||
| {!isRunning ? ( | ||
| <Button onClick={resume} type="primary" theme='solid'>开始</Button> | ||
| ) : ( | ||
| <Button type='danger' onClick={pause} theme='solid'>停止</Button> | ||
| )} | ||
| <Button onClick={reset} type='warning' theme='solid'>重置</Button> | ||
| </Space> | ||
| </div> | ||
| ); | ||
| }; | ||
|
|
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| export default ChronoComponent; |
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