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The simplest native calendar in js

php中世界最好的语言Original: 2017-12-30 16:59:421799browse

What I bring to you this time is the simplest native calendar in js. In a recent project, I suddenly discovered that date objects can be added and subtracted. I used this feature to write a program that can be said to be suitable for anyone who knows JavaScript can be used to write calendars. This article will give you a good introduction.

<!DOCTYPE html> 
<html> 
 <head> 
  <meta charset="UTF-8"> 
  <title></title> 
  <style type="text/css"> 
   *{ 
    margin: 0px; 
    padding: 0px; 
   } 
   #data{ 
    width: 280px; 
    border: 1px solid #000000; 
    margin: 20px auto; 
   } 
   #data > p{ 
    display: flex; 
   } 
   #data > h5{ 
    text-align: center; 
   } 
   #data > p > span{ 
    padding: 0 10px; 
   } 
   #prev,#next{ 
    cursor: pointer; 
   } 
   #nian{ 
    flex: 1; 
    text-align: center; 
   } 
   #title{ 
    overflow: hidden; 
    list-style: none; 
    background: #ccc; 
   } 
   #title > li{ 
    float: left; 
    width: 40px; 
    height: 26px; 
    line-height: 26px; 
    text-align: center; 
   } 
   #date{ 
    overflow: hidden; 
    list-style: none; 
   } 
   #date > li{ 
    float: left; 
    width: 34px; 
    height: 34px; 
    margin: 1px 1px; 
    border: 2px solid rgba(0,0,0,0); 
    line-height: 34px; 
    text-align: center; 
    cursor: pointer; 
   } 
   #date > .hover:hover{ 
    border: 2px solid red; 
   } 
      
   .active{ 
    color: red; 
   } 
  </style> 
 </head> 
 <body> 
     
  <div id="data"> 
   <p> 
    <span id="prev">上一月</span> 
    <span id="nian">2017</span> 
    <span id="next">下一月</span> 
   </p> 
   <h5 id="yue">一月</h5> 
   <ul id="title"> 
    <li>日</li> 
    <li>一</li> 
    <li>二</li> 
    <li>三</li> 
    <li>四</li> 
    <li>五</li> 
    <li>六</li> 
   </ul> 
   <ul id="date"> 
   </ul> 
  </div> 
     
  <script type="text/javascript"> 
   var dat = new Date(); //当前时间 
   var nianD = dat.getFullYear();//当前年份 
   var yueD = dat.getMonth(); //当前月 
   var tianD = dat.getDate(); //当前天 这保存的年月日 是为了 当到达当前日期 有对比 
      
   add(); //进入页面第一次渲染 
      
   function add(){ 
    document.getElementById(&#39;date&#39;).innerHTML = ""; 
       
    var nian = dat.getFullYear();//当前年份 
    var yue = dat.getMonth(); //当前月 
    var tian = dat.getDate(); //当前天 
    var arr=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"]; 
    document.getElementById(&#39;nian&#39;).innerText = nian; 
    document.getElementById(&#39;yue&#39;).innerText = arr[yue]; 
       
    var setDat = new Date(nian,yue + 1,1 - 1); //把时间设为下个月的1号 然后天数减去1 就可以得到 当前月的最后一天; 
    var setTian = setDat.getDate(); //获取 当前月最后一天 
    var setZhou = new Date(nian,yue,1).getDay(); //获取当前月第一天 是 周几 
       
    for(var i=0;i<setZhou ;i++){//渲染空白 与 星期 对应上 
     var li=document.createElement(&#39;li&#39;); 
     document.getElementById(&#39;date&#39;).appendChild(li); 
    } 
       
    for(var i=1;i<=setTian;i++){//利用获取到的当月最后一天 把 前边的 天数 都循环 出来 
     var li=document.createElement(&#39;li&#39;); 
     li.innerText = i; 
     if(nian == nianD && yue == yueD && i == tianD){ 
      li.className = "active"; 
     }else{ 
      li.className = "hover"; 
     } 
        
     document.getElementById(&#39;date&#39;).appendChild(li); 
    } 
       
   } 
      
   document.getElementById("next").onclick = function(){ 
    dat.setMonth(dat.getMonth() + 1); //当点击下一个月时 对当前月进行加1; 
    add(); //重新执行渲染 获取去 改变后的 年月日 进行渲染; 
   }; 
   document.getElementById("prev").onclick = function(){ 
    dat.setMonth(dat.getMonth() - 1); //与下一月 同理 
    add(); 
   }; 
  </script> 
 </body> 
</html>

I believe you have mastered the method after reading the above introduction. For more exciting information, please pay attention to other related articles on the php Chinese website!

The simplest native calendar in js

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