Tom t-c-k
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| const Timer = () => { | |
| const [start, setStart] = useState(new Date()); | |
| const [now, setNow] = useState(new Date()); | |
| useEffect(() => { | |
| const interval = setInterval(() => { | |
| setNow(new Date()); | |
| }, 1000); | |
| return () => { |