JS 日期函数ParseDate格式化

1 . 日期函数ParseDate格式化

 function ParseDate(dateStr, dateParameter) {

    let date = new Date();
    let retTimeStr = dateParameter || "yyyy-MM-dd HH:mm:ss";

    if(typeof(dateStr) !== "undefined" && dateStr.length>0){
      let pattern = new RegExp("^[1-9][0-9]*$");
      dateStr = dateStr.replace(/-/g, "/"); //兼容苹果
      date = pattern.test(dateStr)? new Date(parseInt(dateStr)): new Date(dateStr);
    } 

    if(date.toString() === "Invalid Date"){
      console.error("dateStr参数异常",dateStr);
      return ;
    }

    //年
    let year = date.getFullYear(); 
    //月
    let month = date.getMonth() + 1 > 9 ? date.getMonth() + 1 : "0" + (date.getMonth() + 1);
    //日
    let day = date.getDate() > 9 ? date.getDate() : "0" + date.getDate();
    //小时
    let hour = date.getHours() > 9 ? date.getHours() : "0" + date.getHours();
    //分
    let minute = date.getMinutes() > 9 ? date.getMinutes() : "0" + date.getMinutes();
    //秒
    let second = date.getSeconds() > 9 ? date.getSeconds() : "0" + date.getSeconds();
    //毫秒
    let millisecond = date.getMilliseconds();

    return retTimeStr.replace("yyyy",year)
      .replace("MM",month)
      .replace("dd",day) 
      .replace("HH",hour)
      .replace("mm",minute)
      .replace("ss",second)
      .replace("WW",millisecond.toString().substr(0,2));

  }

    console.log(ParseDate());//2022-07-27 10:01:47
    console.log(ParseDate("","yyyy-MM-dd"));//2022-07-27
    console.log(ParseDate("2022/7/26","yyyy-MM-dd HH:mm:ss"));//2022-07-26 00:00:00
    console.log(ParseDate("2022-7-26","yyyy-MM-dd HH:mm:ss"));//2022-07-26 00:00:00
    console.log(ParseDate("1658807925151","yyyy-MM-dd HH:mm:ss WW"));//2022-07-26 11:58:45 15