How to get Changed or Modified Fields in ServiceNow Scoped Apps?

As you know 'GlideScriptRecordUtil' is not allowed in Scoped Apps, we can user below function to get changed fields on server side

//this will give you array of changed field names
var changed _fields = getChangedFieldNames(current);

function getChangedFieldNames(gr) {
 
var result = [];
var elements = gr.getElements();
var size = elements.length;
for (var i = 0; i  < size; i++) {
var ge = elements[i];
if (ge.changes()) {
result.push(ge.getName());
}
}
 
return result;
}