js根据当前日期并展示为2018-08-13格式

1、js获取当前日期

 var date = new Date();

 var seperator1 = "-";

2、js获取当前日期 的年月日

  var year = date.getFullYear();

  var month = date.getMonth() + 1;

  var strDate = date.getDate();

3、js将获得的年月日进行字符串拼接

if (month >= 1 && month <= 9) {

    month = "0" + month;

  }

  if (strDate >= 0 && strDate <= 9) {

    strDate = "0" + strDate;

  }

  var currentdate = year + seperator1 + month + seperator1 + strDate;

4、完整代码

//获取当前日期2018-08-13

function getNowFormatDate() {

  var date = new Date();

  var seperator1 = "-";

  var year = date.getFullYear();

  var month = date.getMonth() + 1;

  var strDate = date.getDate();

  if (month >= 1 && month <= 9) {

    month = "0" + month;

  }

  if (strDate >= 0 && strDate <= 9) {

    strDate = "0" + strDate;

  }

  var currentdate = year + seperator1 + month + seperator1 + strDate;

  return currentdate;

}

js中直接引用 

var today =  getNowFormatDate()；

此时today ='2018-08-13'