Date

• api
  MDN
  菜鸟教程
• 时间格式转换

Date.prototype.autoString = function() {
    var month = this.getMonth() + 1;
    var day = this.getDate();
    month = month < 10 ? '0' + month : month;
    day = day < 10 ? '0' + day : day;
    var val = this.getFullYear() + "-" + month + "-" + day;
    return val;
}

-时间加减

    //日期加一 其他同理
    let now = new Date();
    now.setDate(now.getDate() +1);