Javascript Function Returns Null in ByRef Argument But Response has Value inside the function

The console.log(oResponse); of oResponse in the function mGetLookUpTableArray writes the information of the json_encoded object in the console log. There is data from the database in the oResponse object.

However console.log("aLookupTable: " + aLookupTable); does not output anything. The message in the console log is aLookupTable: null

So aLookupTable which is passed in as an argument when I call mGetLookUpTableArray is not getting populated in mGetLookUpTableArray. Any ideas?

• Javascript Making The Call of the Below Function

  const sBasePath = ${window.location.protocol}//${window.location.host}${window.location.pathname.split(‘/’)[1] ? ‘/’ + window.location.pathname.split(‘/’)[1] + ‘/’ : ‘/’}`; // Outputs the base path, e.g., “https://example.com/subdirectory/”

  const sURL = sBasePath + “db_includes/get_tb_Lookup.php”;

       const aLookupTable = null;
       mGetLookUpTableArray(sURL, aLookupTable);
       console.log("aLookupTable:  " + aLookupTable);
  

• Javascript Function Being Called

  function mGetLookUpTableArray(sURL, arrLookupTable) {
                   $.ajax({
                       url: sURL,    
                       type: 'Post',    
                       dataType: 'json',
  
                       success: function (oResponse) {
                           console.log(oResponse);
                           arrLookupTable = oResponse; 
  
                       },
                       error: function(oXHR, sStatus, oError) {
                           console.error('Error:', oError);
                           console.error('Status:', sStatus);
                           console.error('Response:', oXHR.responseText);
                       }
                   });
   }