javascript - 我究竟做错了什么。我想显示没有时间戳的日期，但要添加 50 天

Question

var d = new Date(),
datestring = '';

datestring = d.getFullYear() + '-' + (d.getMonth()+1) + '-' + d.getDate()+

d.setDate(d.getDate() + 50);
document.getElementById("new").innerHTML = d;

<p>Your estimated date for completion will be </p>


<p id="new"></p>

这里是新手。试图显示没有时间的日期并添加 500 天。预先感谢您的帮助

Answer 1

var today = new Date();
alert("Today = " + today.toLocaleDateString());
Date.prototype.addDays = function(days) {
    var date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
}
var date = new Date();
date = today.addDays(5)
alert("After 5 days = " + date.toLocaleDateString());