如何在每个按钮上连续单击最接近的候选日期和下一个日期

Question

我试图根据给定的日期连续单击按钮来获取最近的星期三或/然后星期六的日期。我怎样才能做到这一点？$(".btn-info").on("click", function(){   GetDate('2019-09-10');});function GetDate(x){  x = new Date();  var cc = x.setDate(x.getDate() + (1 + 5 - x.getDay()) % 7);  console.log(cc);}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous"><button type="button" class="btn btn-info">Get Next Wednesday / Saturday Date ++ </button>

Answer 1

这样的事情应该工作

console.log(getNext("2019-09-09"));

console.log(getNext("2019-09-10"));

console.log(getNext("2019-09-11"));

console.log(getNext("2019-09-12"));

console.log(getNext("2019-03-06"));

function getNext(dateStr) {

  const date = new Date(dateStr);

  const day = date.getDay();

  const togo = day <= 3 ? 3 - day : 6 - day;

  date.setDate(date.getDate() + togo);

  return date;

}