var dateString="20180608141920";
var formatedDate = dateString.replace( /(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/,'$1/$2/$3 $4:$5:$6');
console.log(formatedDate)
////结果就是
2018/06/08 14:19:20
var dateString="20180608141920";
var formatedDate = dateString.replace( /(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/,'$1/$2/$3 $4:$5:$6');
console.log(formatedDate)
////结果就是
2018/06/08 14:19:20