借助dayjs(一个轻量级的处理时间和日期的JavaScript库)
API中文文档GitHub地址
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API转载
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安装:
NPM:
npm install dayjs --saveimport dayjs from 'dayjs'// 或者 CommonJS// var dayjs = require('dayjs');dayjs().format(); //2020-01-06T10:15:01+08:00CDN:
<!-- 最新的压缩后的 JavaScript 文件 --><script src="https://unpkg.com/dayjs"></script><script> dayjs().format();</script>实现
var dayjs = require('dayjs');//当前年的最开始// console.log( dayjs().startOf('year').$d.valueOf());let yearStar = dayjs().startOf('year').$d.valueOf();//当前月的最开始// console.log(dayjs().startOf('month').$d.valueOf());let monthStar = dayjs().startOf('month').$d.valueOf();//当前周的最开始// console.log(dayjs().startOf('week').$d.valueOf());let weekStar = dayjs().startOf('week').$d.valueOf();//当前天的最开始// console.log(dayjs().startOf('day').$d.valueOf());let todayStar = dayjs().startOf('day').$d.valueOf();//昨天的最开始let yestodayStar = dayjs().startOf('day').$d.valueOf() - 1000*60*60*24;let currenttime;let ss = 1577145600000;//超出今年的年份if(ss < yearStar){ //本身所在的年份 let ss = 1525492800000; console.log('本身所在的年份'); let month = dayjs(ss).month()+1 let date = dayjs(ss).date() month > 10 ? month = month : month = '0'+ month date > 10 ? date = date : date = '0'+ date currenttime = `${dayjs(ss).year()}-${month}-${date}`}//在今年不在本月中if(ss > yearStar && ss < monthStar ){ //当前年的日期 let ss = 1571760000000; console.log('当前年的日期'); let month = dayjs(ss).month()+1 let date = dayjs(ss).date() month > 10 ? month = month : month = '0'+ month date > 10 ? date = date : date = '0'+ date currenttime = `${dayjs(ss).year()}-${month}-${date}` }//在本月不在本周if(ss > monthStar && ss < weekStar ){ //当前月的日期 let ss = 1575302400000; console.log('当前月的日期'); let month = dayjs(ss).month()+1 let date = dayjs(ss).date() month > 10 ? month = month : month = '0'+ month date > 10 ? date = date : date = '0'+ date currenttime = `${month}-${date}`}//在本周不在昨天if(ss > weekStar && ss < yestodayStar){ //周几 let ss = 1576987200000; console.log('周几'); let weekObj = {0:'日',1:'一',2:'二',3:'三',4:'四',5:'五',6:'六'}; let week = dayjs(ss).day() let weekValue = weekObj[week]; let hour = dayjs(ss).hour() let minute = dayjs(ss).minute() hour > 10 ? hour = hour : hour = '0'+ hour minute > 10 ? minute = minute : minute = '0'+ minute currenttime = `周${weekValue}-${hour}:${minute}` }//昨天的if( ss > yestodayStar && ss < todayStar) { //昨天 let ss = 1577073600000; console.log('昨天'); let hour = dayjs(ss).hour() let minute = dayjs(ss).minute() hour > 10 ? hour = hour : hour = '0'+ hour minute > 10 ? minute = minute : minute = '0'+ minute currenttime = `昨天-${hour}:${minute}` }//当天的if(ss > todayStar){ //时 + 分 let ss = 1577145600000; console.log('今天'); let hour = dayjs(ss).hour() let minute = dayjs(ss).minute() hour > 10 ? hour = hour : hour = '0'+ hour minute > 10 ? minute = minute : minute = '0'+ minute currenttime = `${hour}:${minute}`}console.log(currenttime);