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JavaScriptPlus
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index2.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="Time"></div>

    <script>
        /**
         * 计算当年时间的倒数计时器，要求在网页上面实时动态显示“xx年还剩xx天xx时xx分xx秒”
         */
        function gettime() {
            let timenum = new Date("2023-01-01T00:00:00Z");
            let timexian = new Date();
            let dateTime = timenum - timexian
            let dates = new Date(dateTime)
            // 获取天
            let Day = dates.getDate()
            // 获取小时
            let Hourse = dates.getHours()
            // 获取分钟
            let Minutes = dates.getMinutes()
            //获取秒
            let Seconds = dates.getSeconds()
            return `2023年还剩${Day + 31 + 30 + 31}天${Hourse}时${Minutes}分${Seconds}秒`
        }

        setInterval(() => {
            let getTimes = document.querySelector("#Time")
            getTimes.innerHTML = gettime()
        }, 1000)
    </script>
</body>

</html>