前端项目中经常运用到的时间与时间戳转化

将时间戳转化为2018-10-10 18:00:00格式

function toTime(timestamp){
    let date = new Date(timestamp);
    //PHP时间戳为10位需*1000，其他时间戳为13位的不需乘1000
    let Y = date.getFullYear() + '-';
    let M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '-';
    let D = date.getDate() + ' ';
    let h = date.getHours() + ':';
    let m = date.getMinutes() + ':';
    let s = date.getSeconds();
    return Y+M+D+h+m+s;  
}

获取当前时间，以横线拼接

function timestampToTime2(){
    let date = new Date();
    let Y = date.getFullYear();
    let M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1);
    let D = date.getDate() < 10 ? '0'+date.getDate() : date.getDate();
    let h = date.getHours() < 10 ? '0'+date.getHours() : date.getHours();
    let m = date.getMinutes() < 10 ? '0'+date.getMinutes() : date.getMinutes();
    let s = date.getSeconds() < 10 ? '0'+date.getSeconds() : date.getSeconds();
    return Y+'-'+M+'-'+D+' '+h+':'+m+':'+s;  
}

其他获取本周本月本季度的时间段

// 获取当天时间段
function time(){
	let time = new Date();
	let now = time.getTime();
	let todayStart = time.getFullYear()+'-'+(time.getMonth()+1)+'-'+time.getDate()+'T'+'0:0:0'+'Z';
	let todayEnd = time.getFullYear()+'-'+(time.getMonth()+1)+'-'+time.getDate()+'T'+'23:59:59'+'Z';
	// if(!new Date(todayStart).getTime()){
	// 	todayStart = todayStart.replace(/-/g,'/');
	// 	todayEnd = todayEnd.replace(/-/g,'/');
	// }
	return([todayStart,todayEnd])
	// console.log(new Date(todayStart),new Date(todayEnd))
	// return [new Date(todayStart),new Date(todayEnd)];
};
// console.log(time())
// 获取本月时间段
function month(){
	let month = new Date();
	let monthStart = month.getFullYear()+'-'+(month.getMonth()+1)+'-'+1+' '+'0:0:0';
	// console.log(month.getMonth())
	if (month.getMonth() <= 10){
		var monthEnd = month.getFullYear()+'-'+(month.getMonth()+2)+'-'+1+' '+'0:0:0';
	} else {
		var monthEnd = (month.getFullYear()+1)+'-'+1+'-'+1+' '+'0:0:0';
	}
	// if(!new Date(monthStart).getTime()){
	// 	monthStart = monthStart.replace(/-/g,'/');
	// 	monthEnd = monthEnd.replace(/-/g,'/');
	// }
	// return [new Date(monthStart),new Date(monthEnd)];
	return [monthStart,monthEnd];
};
// 获取本周时间段
function week(){
	let now = new Date(); //当前日期 
	let nowDayOfWeek = now.getDay(); //今天本周的第几天 
	let nowDay = now.getDate(); //当前日 
	let nowMonth = now.getMonth(); //当前月 
	let nowYear = now.getYear()+1900; //当前年 
	let weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek); 
	let weekEndDate = new Date(nowYear, nowMonth, nowDay + (7 - nowDayOfWeek)); 
	weekStartDate = toTime(Date.parse(weekStartDate));
	weekEndDate = toTime(Date.parse(weekEndDate));
	// if(!new Date(weekStartDate).getTime()){
	// 	weekStartDate = weekStartDate.replace(/-/g,'/');
	// 	weekEndDate = weekEndDate.replace(/-/g,'/');
	// }
	return [weekStartDate,weekEndDate];
};
// 获取本季度时间段
function quarter(){
	let now = new Date();
	let nowYear = now.getYear()+1900;//年
	let nowMonth = now.getMonth(); //当前月 
	let start = '';
	let end = '';
	if(nowMonth < 3){
		start = nowYear+'-1-1 0:0:0';
		end = nowYear+'-4-1 0:0:0';
	}else if (nowMonth >= 3 && nowMonth < 6){
		start = nowYear+'-4-1 0:0:0';
		end = nowYear+'-7-1 0:0:0';
	}else if(nowMonth >= 6 && nowMonth< 9){
		start = nowYear+'-7-1 0:0:0';
		end = nowYear+'-10-1 0:0:0';
	}else if (nowMonth >= 9){
		start = nowYear+'-10-1 0:0:0';
		end = (nowYear+1)+'-1-1 0:0:0';
	}
	// if(!new Date(nowYear+'-1-1 0:0:0').getTime()){
	// 	start = start.replace(/-/g,'/');
	// 	end = end.replace(/-/g,'/');
	// 	return [new Date(start),new Date(end)];
	// }
	// return [new Date(start),new Date(end)];
	return [start,end];
};

注意ie中时间是2018/10/10 18:00:00格式

replace(/-/g,'/')

用"/"替换"-"即可。