(图片来自W3school)

let myDate = new Date();myDate.setDate(myDate.getDate() + 1);let year = myDate.getFullYear();//getYear()方法也能获取但是部分浏览器不兼容，所以用getFullYear()方法let month = myDate.getMonth() + 1; //获取的数值是0-11，用来表示月份要+1let day = myDate.getDay();let hour = myDate.getHours();let minute = myDate.getMinutes();let second = myDate.getSeconds();if (month < 10) { month = "0" + month;}if (day < 10) { day = "0" + day;}if (hour < 10) { hour = "0" + hour;}if (minute < 10) { minute = "0" + minute;}if (second < 10) { second = "0" + second;}let nowTime = `${year}-${month}-${day} ${hour}:${minute}:${second}`;