js 日期格式化

//日期格式化"2017-07-05"
function formatTime(date) {
    var year = date.getFullYear();
    var month = date.getMonth() + 1, month = month < 10 ? '0' + month : month;
    var day = date.getDate(), day = day < 10 ? '0' + day : day;
    return year + '-' + month + '-' + day;
}

  //使用方法，
 var date = new Date();
 var data1 = formatTime(date); //"2019-04-03"
 date.setDate(date.getDate() + 1);//加一天
 var data2 = formatTime(date); //"2019-04-04"