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时间戳转半小时倒计时,请问怎么实现呢

有个订单待支付,后端给一个时间戳1606981908怎么转成半小时的倒计时


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后端返回的是一个秒为单位的时间戳。

const target = 1606981908 * 1000 // 目标时间毫秒时间戳
function fn () {
    setTimeout(() => {
        if(target <= Date.now()) {
            // 定时结束
        } else {
            // 递归自身
            fn()
        }
    }, 1000)
}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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