JavaScript快速实现日历效果

本文实例为大家分享了JavaScript快速实现日历效果的具体代码，供大家参考，具体内容如下
效果图
JavaScript快速实现日历效果
代码
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;

    }

    #calendar {
      background-color: #9900ff;
      color: #fff;
      border-radius: 5px;
      margin: 100px auto;
    }

    #title {
      font-size: 1.4em;
      padding: 4px 0.55em;
    }

    #days th {
      font-weight: bold;
      text-align: center;
      padding: 4px 0.55em;
    }

    #calendar td {
      text-align: center;
      padding: 4px 20px;
    }

    #today {
      color: #f00;
      font-weight: bold;
    }

    .poin {
      cursor: pointer;
      cursor: hand;
    }
  </style>
  <script>
    window.onload=function(){
      var form = document.getElementById('calendar');
      // 通过日历对象去调用自身的init方法
      calendar.init(form);
    }
    var calendar = {
      year: null,
      month: null,
      //日的数组
      dayTable: null,
      //初始化函数
      init(form) {
        // 1获取日数组
        this.dayTable=form.getElementsByTagName('td');
        //2创建日历,传入当前时间
        this.createCalendar(form,new Date());
        var nextMon=form.getElementsByTagName('th')[2];
        var preMon=form.getElementsByTagName('th')[0];
        preMon.onclick=function(){
        calendar.clearCalendar(form)
          var preDate=new Date(calendar.year,calendar.month-1,1);
          calendar.createCalendar(form,preDate)
        }
        nextMon.onclick=function(){
          calendar.clearCalendar(form)
          var nextDate=new Date(calendar.year,calendar.month+1,1);
          calendar.createCalendar(form,nextDate)
        }
      },
      //清除日历数据
      clearCalendar(form){
        var tds=form.getElementsByTagName('td');
        for (var i = 0; i < tds.length; i++) {
          tds[i].innerHTML='&nbsp';
          // 清除今天的样式
          tds[i].id='';
        }
      },
      // 3生成日历
      // from table表格 date要创建的日期
      createCalendar(form,date){
        //获取此时的年份
         this.year=date.getFullYear(); 
         //获取此时的月份
         this.month=date.getMonth();

         //年份月份写入日历
         form.getElementsByTagName('th')[1].innerHTML = this.year+"年"+(this.month+1)+"月";
         //获取本月的天数
         var dataNum=this.getDateLen(this.year,this.month);
         var fristDay = this.getFristDay(calendar.year,calendar.month);
        // 循环将每一天的天数写入到日历中
        // 让i表示日期。
        for (var i = 1; i <= dataNum; i++) {
          this.dayTable[fristDay+i-1].innerHTML=i;
          var nowDate =new Date();
          if(i ==nowDate.getDate() && calendar.month ==nowDate.getMonth()&&calendar.year == nowDate.getFullYear()){
            //  将当期元素的id设置为today
            calendar.dayTable[i+fristDay-1].id = "today";
          }
        }
      },
       // 获取本月份的天数
       getDateLen(year,month){
        //获取下个月的第一天
        var nextMonth=new Date(year,month+1,1);
        // 设置下月第一天的小时-1，也就是上个月最后一天的小时数，随便减去一个值不要超过24小时
        nextMonth.setHours(nextMonth.getHours()-1);
        //获取此时下个月的日期,就是上个月最后一天.
        return nextMonth.getDate();
       },
       // 获取本月第一天为星期几。
      getFristDay:function(year,month){
        var fristDay=new Date(year,month,1);
        return fristDay.getDay();
      }
    } 
  </script>
</head>

<body>
  <table id="calendar">
    <tr>
      <!-- 向左箭头 -->
      <th class="poin">&lt;&lt;</th>
      <!-- 年月 -->
      <th id="title" colspan="5"></th>
      <!-- 向右箭头 -->
      <th class="poin">&gt;&gt;</th>
    </tr>
    <tr id="days">
      <th>日</th>
      <th>一</th>

      <th>二</th>
      <th>三</th>
      <th>四</th>
      <th>五</th>
      <th>六</th>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>

</body>

</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持NICE源码。
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