<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>日历插件</title> <link href="https://www.jb51.net/article/css/reset.css" > <link href="https://www.jb51.net/article/css/index.css" > </head> <body> <div> <button>上月</button> <span>2019-01</span> <button>下月</button> </div> <div> </div> </body> <script> // 获取本月第一天 function getMonthDay(date){ date=new Date(date.valueOf()) date.setDate(1); return date } // 获取本月最后一天 function getMonthLastDay(date){ date=new Date(date.valueOf()) date.setMonth(date.getMonth()+1); date.setDate(0); return date } //获取本月的时间对象集合 function getMonth(date){ var arr=[] // 获取本月第一天 var _date=getMonthDay(date) // // 获取本月最后一天 var dataLast=getMonthLastDay(date).getDate() arr.push(new Date(_date.valueOf())) // 处理本月第一天 到本月最后一天 for(var i =1;i<dataLast;i++){ _date.setDate(_date.getDate()+1) arr.push(new Date(_date.valueOf())) } // 向前补全，重置为本月一号 _date=getMonthDay(date) var forln=_date.getDay() for(var i=0;i<forln;i++){ _date.setDate(_date.getDate()-1) arr.unshift(new Date(_date.valueOf())) } // 向后补全,重置为本月最后一天 _date=getMonthLastDay(date) forln=_date.getDay() for(var i=forln;i<6;i++){ _date.setDate(_date.getDate()+1) arr.push(new Date(_date.valueOf())) } return arr } // 将集合渲染到页面 function renderTable(monthDateArr,date){ document.getElementById("showtime").innerHTML=`${date.getFullYear()}-${date.getMonth()+1}` var table=document.createElement('table') var trTh=document.createElement('tr') trTh.innerHTML=` <th>周日</th> <th>周一</th> <th>周二</th> <th>周三</th> <th>周四</th> <th>周五</th> <th>周六</th> ` table.appendChild(trTh) var tr=document.createElement('tr') for(let i in monthDateArr){ var td=document.createElement('td') td.innerHTML=monthDateArr[i].getDate() tr.appendChild(td) if((i*1+1)%7===0){ table.appendChild(tr) tr=document.createElement('tr') }else if(i == monthDateArr.length-1){ table.appendChild(tr) } } document.getElementById("box").innerHTML=table.outerHTML } var date=new Date() document.getElementById('pre').onclick=function(){ date.setDate(1) date.setMonth(date.getMonth()-1) renderTable(getMonth(date),date) } document.getElementById('next').onclick=function(){ date.setDate(1) date.setMonth(date.getMonth()+1) rrenderTable(getMonth(date),date) } renderTable(getMonth(date),date) </script> </html>
css代码
.box{ width: 700px; margin: 0 auto; box-sizing: border-box; padding: 0 1px; } table{ width: 100%; } th,td{ width:100px; text-align: center; } th{ height: 30px; line-height: 30px; background: #e0e5e5; } td{ height: 70px; line-height: 70px; background: #f3f5f5; } .show{ display: flex; align-items: center; justify-content: center; }