小程序 获取日期/昨天、今天、明天

获取当前时间

onLoad: function(){
    var that = this;
    that.getNowTime()
}

getNowTime: function() {
  var now = new Date();
  var year = now.getFullYear();
  var month = now.getMonth() + 1;
  var day = now.getDate();
  if(month < 10) {
    month = '0' + month;
  };
  if(day < 10) {
    day = '0' + day;
  };
  //  如果需要时分秒，就放开
  var h = now.getHours();
  var m = now.getMinutes();
  var s = now.getSeconds();
  var formatDate = year + '-' + month + '-' + day + ' ' + h + ':' + m + ':' + s;
  console.log('当前时间',formatDate)
  return formatDate;
},

获取昨天、今天、明天

today 是需要计算的某一天的日期例如“2018-12-12”，传 null 默认今天，addDayCount 是要推算的天数， -1是前一天，0是今天，1是后一天。

onLoad: function(options) {
  var that = this;
  //获取明天
  that.getDateStr(null,1)
},

getDateStr: function(today, addDayCount) {
var date;
if(today) {
  date = new Date(today);
}else{
  date = new Date();
}
date.setDate(date.getDate() + addDayCount);//获取AddDayCount天后的日期 
  var y = date.getFullYear();
  var m = date.getMonth() + 1;//获取当前月份的日期 
  var d = date.getDate();
  if(m < 10){
    m = '0' + m;
  };
  if(d < 10) {
    d = '0' + d;
  };
  console.log( y + "-" + m + "-" + d)
  return y + "-" + m + "-" + d;
},

原文：https://www.jianshu.com/p/9645cd3461d3