Specify the format time, and fill in zero before the month and days

antd DatePicker The selected time , It can be used format format ：
https://blog.csdn.net/weixin_43915401/article/details/112880693
js Get time method ：
https://blog.csdn.net/weixin_43915401/article/details/114014926

js The time when the specified format is generated , You can only spell it yourself , Just ... Add up , Fill the string .
padStart(2,'0')2 A string , Less than two , Fill zero in front .

let date = new Date();
YYYY-MM-DD = date.getFullYear() + '-'
        + (date.getMonth() + 1).toString().padStart(2, '0') + '-'
        + (date.getDate()).toString().padStart(2, '0');