js获取当天、昨天、指定时间2021-04-16 00:00--23:59的时间对象

来看图、看需求，获取今日，昨天，近7天，近30天的时间，格式根据自己需求可自定义。2021-04-16 00:00~~2021-04-16 23:59

上代码

日期代码，自己可在控制台打印查看

// 如果只是简单的格式化只变成2021-04-16 19:39:24，需要运用三目运算判断并在适当的地方加上0，完成所需要的格式。
var date1 = new Date(new Date(new Date().toLocaleDateString()).getTime());
var date2 = new Date(new Date(new Date().toLocaleDateString()).getTime()+24*60*60*1000-1);
var todayStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) + ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var startTime = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()-1) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) + ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var endTime = date2.getFullYear() + '-' + (date2.getMonth() + 1) + '-' + (date2.getDate()-1) + ' ' + date2.getHours() + ':' + date2.getMinutes()+ ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var weekDateStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()-7) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) + ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var weekDateEnd = date2.getFullYear() + '-' + (date2.getMonth() + 1) + '-' + (date2.getDate()-7) + ' ' + date2.getHours() + ':' + date2.getMinutes()+ ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var monthDateStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() ):(date1.getMonth() + 1)-1)+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) + ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())
var monthDateEnd = date2.getFullYear() + '-' + (date2.getMonth() +1) + '-' + (date2.getDate()) + ' ' + date2.getHours() + ':' + date2.getMinutes()+ ":" + (date1.getSeconds()<10?"0"+date1.getSeconds():date1.getSeconds())

// todayStart 今天开始日期  startTime 昨日开始日期  endTime 昨日结束日期
// weekDateStart 近7天开始日期  weekDateEnd 近7天结束日期 
// monthDateStart 近30天开始日期  monthDateEnd 近30天结束日期 

全部代码

// 如果只是简单的格式化只变成2021-04-16 19:39:24，需要运用三目运算判断并在适当的地方加上0，完成所需要的格式。
var date1 = new Date(new Date(new Date().toLocaleDateString()).getTime());
var date2 = new Date(new Date(new Date().toLocaleDateString()).getTime()+24*60*60*1000-1);
var todayStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) 
var startTime = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()-1) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) 
var endTime = date2.getFullYear() + '-' + (date2.getMonth() + 1) + '-' + (date2.getDate()-1) + ' ' + date2.getHours() + ':' + date2.getMinutes()
var weekDateStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() + 1):(date1.getMonth() + 1))+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()-7) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) 
var weekDateEnd = date2.getFullYear() + '-' + (date2.getMonth() + 1) + '-' + (date2.getDate()-7) + ' ' + date2.getHours() + ':' + date2.getMinutes()
var monthDateStart = date1.getFullYear() + "-" + ((date1.getMonth() + 1) < 10 ? "0" + (date1.getMonth() ):(date1.getMonth() + 1)-1)+ "-" + (date1.getDate() < 10 ? "0" + date1.getDate():date1.getDate()) + " " + (date1.getHours()<10?"0"+date1.getHours():date1.getHours()) + ":" + (date1.getMinutes()<10?"0"+date1.getMinutes():date1.getMinutes()) 
var monthDateEnd = date2.getFullYear() + '-' + (date2.getMonth() +1) + '-' + (date2.getDate()) + ' ' + date2.getHours() + ':' + date2.getMinutes()
// todayStart 今天开始日期  startTime 昨日开始日期  endTime 昨日结束日期
// weekDateStart 近7天开始日期  weekDateEnd 近7天结束日期 
// monthDateStart 近30天开始日期  monthDateEnd 近30天结束日期 
function nowDate(){
     	//当前时间
	let today =new Date();
	let h = today.getFullYear();
	let m = today.getMonth()+1;
	let d = today.getDate();
	let d1 = today.getTime();
	console.log(d1)
          let hour=today.getHours();
          let mint=today.getMinutes();
          let miao=today.getSeconds();
	m = m < 10 ? '0' + m :m;
	d = d < 10 ? '0' + d :d;
	console.log( '当前时间：',h + '-' + m + '-' + d + ' ' + hour+':'+ mint+':'+ miao)
	return h + '-' + m + '-' + d + ' ' +  hour + ':'+ mint;
}
function selectDate(obj){
       //客服呼叫排名 日期选择
	let val = $(obj).val();
	let num 
	if(val == "近7天"){
       //近7天
		num = 7
		$('.comDate').val(weekDateStart)
		$('.nowDate2').val(weekDateEnd)
		console.log('val:',val)
		console.log(weekDateStart,"----",weekDateEnd)
	}else if(val == "今日"){
     	//今日
		$('.comDate').val(todayStart)
		$('.nowDate2').val(nowDate())
		console.log('val:',val)
		console.log(todayStart,"----",nowDate())
	}else if(val == "昨日"){
     	//昨日
		$('.comDate').val(startTime)
		$('.nowDate2').val(endTime)
		console.log('val:',val)
		console.log(startTime,"----",endTime)
	}else if(val == "近30天"){
     	//近30天
		$('.comDate').val(monthDateStart)
		$('.nowDate2').val(monthDateEnd)
		console.log('val:',val)
		console.log(startTime,"----",endTime)
	}else{
      //自定义
		console.log('val:',val)
	}
}

html代码

<div class="com_dataTime_select" style="width: 650px;right:2px;">
	<div class="checkin-message">
		<div style="width:100px;">日期选择div> 
		<div class=" g-select distribution-room-select">
			<input type="text" value="今日"  class="input-height select_img ipt">
			<select onchange="selectDate(this)">
				<option value="今日">今日option>
				<option value="昨日">昨日option>
				<option value="近7天">近7天option>
				<option value="自定义">自定义option>
			select>
		div>
		<div class="" >丨 div>
		<div>
			<input type="text" class="g-input Wdate f-left comDate"  value="2021-01-01 17:57" onclick="WdatePicker({dateFmt:'yyyy-MM-dd HH:mm'})" readonly>
			<span style="display: inline-block;position: relative;left: 64px;">~span>
			<input type="text" class="g-input Wdate f-left nowDate2" value="2021-12-31 17:57" onclick="WdatePicker({dateFmt:'yyyy-MM-dd HH:mm'})" readonly>
		div>
	div>
	div>