JavaScript 时间戳转日期，动态格式

JavaScript 时间戳转日期，动态格式

引用案例：

this.handleDateTime(new Date())    //2021-07-29 15:23:36
this.handleDateTime(new Date(),'yyyy/mm/dd hh:MM:ss')    //2021/07/29 24:47
this.handleDateTime(new Date(),'mm/dd MM:ss')        //07/29 34:40
this.handleDateTime(new Date(),'hh:MM:ss')        //15:35:25
this.handleDateTime(1626678335000,'mm/dd hh:MM:ss')    //07/19 15:05:35
this.handleDateTime(1626678335000,'yyy/mm/dd hh:MM:ss')    //2021/07/19 15:05:35

/**
*timestamp:时间戳
*formateType:需要转换的格式
*/

handleDateTime(timestamp,formateType){
  let date=new Date(timestamp);
  let line='-'
  let value='';
  let format={
    yyyy:date.getFullYear(),
    mm:date.getMonth()+1,
    dd:date.getDate(),
    hh:date.getHours(),
    MM:date.getMinutes(),
    ss:date.getSeconds(),
  }
  for (let i in format){
    if(format[i]<10){
      format[i]="0"+format[i]
    }
  }

  if(formateType){
    let m=false;
    let y=false

    if(formateType.split("/").length>1){
      line='/'
    }

    if(formateType.indexOf('yyyy')!=-1){
      value+=format.yyyy;
      m=true
      y=true
    }
    if(formateType.indexOf('mm')!=-1){
      value+=y?line+format.mm:format.mm;
      m=true
      y=true
    }
    if(formateType.indexOf('dd')!=-1){
      value+=y?line+format.dd:format.dd;
      m=true
    }
    if(formateType.indexOf('hh')!=-1){
      value+=m?(" "+format.hh+":"):(format.hh+":");
      m=false
    }
    if(formateType.indexOf('MM')!=-1){
      value+=m?" "+format.MM:format.MM;
      m=false
    }
    if(formateType.indexOf('ss')!=-1){
      value+=m?" "+format.ss:":"+format.ss;
      m=false
    }
  }else{
    value=format.yyyy+line+format.mm+line+format.dd+" "+format.hh+":"+format.MM+":"+format.ss
  }


  return value
}