New ideas for time formatting in JavaScript toLocaleString()

Date.prototype.format = function(dateStr) {
    let date = new Date();
    let year = date.getFullYear();
    let month = date.getMonth() + 1;
    let day = date.getDate().toString().padStart(2, "0");
    let hour = date.getHours();
    let minute = date.getMinutes();
    let second = date.getSeconds();
    dateStr = dateStr.replace("年", year)
        .replace("月", month)
        .replace("日", day)
        .replace("hour", hour)
        .replace("minute", minute)
        .replace("秒", second);
    return dateStr;
};
 
// Using the above method console.log(new Date().format("year-month-day")); // 2021-11-04

// Date, output current time let date = new Date();
// This is Greenwich Mean Time format console.log(date.toString()); // Thu Nov 04 2021 10:11:35 GMT+0800 (China Standard Time)
// This is the local time format console.log(date.toLocaleString()); // 2021/11/4 10:18:08 AM

let date = new Date();
// 24-hour system let options = {
    year: 'numeric', month: 'numeric', day: 'numeric',
    hour: 'numeric', minute: 'numeric', second: 'numeric',
    hour12: false
};
console.log(date.toLocaleString("zh-CN", options)); // 2021/11/4 10:33:01

let date = new Date();
let options = {
    weekday: "long"
};
console.log(date.toLocaleString("zh-CN", options)); // Thursday