Remove comma-separated values from two fields ServiceNow

To subtract (remove) values from one comma-separated string (the "big" string) using another comma-separated string (the "small" string) in ServiceNow

var bigString = "a,b,c,d,e";
var smallString = "b,d";
 // Step 1: Split both strings into arrays
var bigArray = bigString.split(',');
var smallArray = smallString.split(',');
 // Step 2: Filter the bigArray to exclude values in smallArray
var resultArray = bigArray.filter(function(item) {
    return !smallArray.includes(item.trim());
});
 // Step 3: Join the filtered array back into a comma-separated string
var finalResult = resultArray.join(',');
 console.log(finalResult);  // Output: "a,c,e"