Highcharts tooltip formatter problem

now there is a requirement to return xxx on PC and return default value
formatter: {

on mobile.
if(pc){
    return xxx;
}else{
    , ,return?
}  

}

Jan.08,2022

final solution:

   

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e506f1-4509e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e506f1-4509e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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