js 现在的时间距离本月月底的倒计时(html)

现在的时间距离本月月底的倒计时

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<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>现在的时间距离本月月底的倒计时</title><style>body {padding: 0;margin: 0;}.index-time {color: #333333;text-align: left;font-size: 28px;line-height: 80px;width: 550px;margin: 0 auto;}.index-date {color: #ff5722;}</style>
</head><body><div class="index-time"><div class="index-date" id="date"></div><div class="index-date" id="reachDate"></div><div class="index-time-son"><div class="time-son-m" id="timer">距离指定日期：<span class="time-hei time-hei1">00</span> 天<span class="time-hei time-hei2">00</span> 小时<span class="time-hei time-hei3">00</span> 分<span class="time-hei time-hei4">00</span> 秒</div></div></div><script>function getDays() {// 1.获取本月的天数var date = new Date();var year = date.getFullYear();var mouth = date.getMonth() + 1;var days = date.getDate();// 2.本月的天数 - 用本月已经过去的时间 （天数 小时 分钟 秒数）var myDate = date.getDate();var hours = date.getHours();var min = date.getMinutes();var second = date.getSeconds();var Milliseconds = date.getMilliseconds();// 当前日期时间document.getElementById('date').innerHTML = '当前时间：' + year + '-' + mouth + '-' + days + ' ' + hours + ':' + min + ':' + second;if (mouth == 2) {days = year % 4 == 0 ? 29 : 28;} else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {days = 31;} else {days = 30;}// 到达日期document.getElementById('reachDate').innerHTML = '指定时间：' + year + '-' + mouth + '-' + days;// 天数相减var differenceday = days - myDate - 1;differenceday = differenceday > 9 ? differenceday : "0" + differenceday;// 小时相减var differencehours = 1 * 23 - hours;differencehours = differencehours > 9 ? differencehours : "0" + differencehours;// 分钟相减var differencemin = 1 * 59 - min;differencemin = differencemin > 9 ? differencemin : "0" + differencemin;// 秒数相减var differencesecond = 1 * 59 - second;differencesecond = differencesecond > 9 ? differencesecond : "0" + differencesecond;// 渲染到页面上var timer = document.getElementById('timer');var span = timer.getElementsByTagName('span');span[0].innerHTML = differenceday;span[1].innerHTML = differencehours;span[2].innerHTML = differencemin;span[3].innerHTML = differencesecond;};//倒计时var timer = window.setInterval(function () {getDays();}, 1000);</script>
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