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JS number is insufficient, and 0 is added

2022-07-07 22:21:00 【Belden wind】

Mode one , Use padStart

'9'.padStart(2,0);// 09

Mode two , Use Intl.NumberFormat

new Intl.NumberFormat(undefined, {
    minimumIntegerDigits: 2,
    useGrouping:false
}).format(9);//09
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