使用这个函数，它解决了我的问题:

    let nextDate = (daysAhead:number) => {
      const today = new Date().toLocaleDateString().split('/')
      const invalidDate = new Date(`${today[2]}/${today[1]}/${Number(today[0])+daysAhead}`)
      if(Number(today[1]) === Number(12)){
        return new Date(`${Number(today[2])+1}/${1}/${1}`)
      }
      if(String(invalidDate) === 'Invalid Date'){
        return new Date(`${today[2]}/${Number(today[1])+1}/${1}`)
      }
        return new Date(`${today[2]}/${Number(today[1])}/${Number(today[0])+daysAhead}`)
    }

最简单的方法是转换为毫秒，然后加上1000*60*60*24毫秒，例如:

var tomorrow = new Date(today.getTime()+1000*60*60*24);

两种方法:

1:

var a = new Date()
// no_of_days is an integer value
var b = new Date(a.setTime(a.getTime() + no_of_days * 86400000)

2:类似上述方法

var a = new Date()
// no_of_days is an integer value
var b = new Date(a.setDate(a.getDate() + no_of_days)

在遵循其他人的建议之前，你首先需要解析你的字符串:

var dateString = "2010-09-11";
var myDate = new Date(dateString);

//add a day to the date
myDate.setDate(myDate.getDate() + 1);

如果你想让它恢复到相同的格式，你必须“手动”完成:

var y = myDate.getFullYear(),
    m = myDate.getMonth() + 1, // january is month 0 in javascript
    d = myDate.getDate();
var pad = function(val) { var str = val.toString(); return (str.length < 2) ? "0" + str : str};
dateString = [y, pad(m), pad(d)].join("-");

但我建议像其他回复中提到的那样获得Date.js，这将对你有很大帮助。

使用vanilla js递增日期年份:

start_date_value = "01/01/2019"
var next_year = new Date(start_date_value);
next_year.setYear(next_year.getYear() + 1);
console.log(next_year.getYear()); //=> 2020

以防有人想增加date (day)以外的值

var myDate = new Date();

//add a day to the date
myDate.setDate(myDate.getDate() + 1);