编辑代码

function dateToString(date:Date,format:String):String {
    const year:Number=date.getFullYear();
    const month:Number=date.getMonth()+1;
    const day:Number=date.getDate();
    const hours:Number=date.getHours();
    const minutes:Number=date.getMinutes();
    const seconds:Number=date.getSeconds();
    // 注意：replace第二个参数必须是字符串
    format=format.replace(/YYYY/,year.toString()).replace(/MM/,month.toString()).replace(/dd/,day.toString());
    format=format.replace(/HH/,hours.toString()).replace(/mm/,minutes.toString()).replace(/ss/,seconds.toString());
    return format;
}
console.log(dateToString(new Date(),"YYYY-MM-dd HH:mm:ss"));