你的位置:首页 > Java教程

[Java教程]javascript 日期月份加减


项目中需要用到,自己写了一个。javascript日期按月加减

<!DOCTYPE html><html function dateToDate(date) {      var sDate = new Date();      if (typeof date == 'object'        && typeof new Date().getMonth == "function"        ) {        sDate = date;      }      else if (typeof date == "string") {        var arr = date.split('-')        if (arr.length == 3) {          sDate = new Date(arr[0] + '-' + arr[1] + '-' + arr[2]);        }      }      return sDate;    }    function addMonth(date, num) {      num = parseInt(num);      var sDate = dateToDate(date);      var sYear = sDate.getFullYear();      var sMonth = sDate.getMonth() + 1;      var sDay = sDate.getDate();      var eYear = sYear;      var eMonth = sMonth + num;      var eDay = sDay;      while (eMonth > 12) {        eYear++;        eMonth -= 12;      }      var eDate = new Date(eYear, eMonth - 1, eDay);      while (eDate.getMonth() != eMonth - 1) {        eDay--;        eDate = new Date(eYear, eMonth - 1, eDay);      }      return eDate;    }    function calcDate() {      var d = document.getElementById('date').value;      var n = document.getElementById('num').value;      var eDate = addMonth(d, n);      document.getElementById('result').innerHTML = eDate.getFullYear() + '-' + (eDate.getMonth() + 1) + '-' + eDate.getDate();    }  </script></head><body>  <input type="date" id="date" />  <input type="number" id="num" value="1" />  <input type="button" value="计算" onclick="calcDate()" />  <div id="result"></div></body></html>