Get Caller Details using Script Include | Client Scripts | Script Includes | ServiceNow

For More Information, please check details below:
In this session, I have explained how to return multiple values from the script include and pass it to the client side.
Script Type - Client Scripts & Script Includes
Table - Incident
Type - onChange based on Caller
====================CLIENT SCRIPT======================
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
// if (isLoading || newValue === '') {
// return;
// }
//Type appropriate comment here, and begin script below
var ga1 = new GlideAjax('FetchUserDetails');
ga1.addParam('sysparm_name', 'getData');
ga1.addParam('sysparm_user', newValue);
ga1.getXMLAnswer(setDetails);
function setDetails(response) {
var pVal = JSON.parse(response);
g_form.setValue('u_manager', pVal.manager);
g_form.setValue('u_user_s_location', pVal.location);
g_form.setValue('u_mobile_number', pVal.mobile_number);
g_form.setValue('u_username', pVal.username);
g_form.setValue('u_email', pVal.email);
}
}
====================SCRIPT INCLUDE======================
var FetchUserDetails = Class.create();
FetchUserDetails.prototype = Object.extendsObject(AbstractAjaxProcessor, {
getData: function() {
var user = this.getParameter('sysparm_user');
var obj = {};
var usr = new GlideRecord('sys_user');
usr.addQuery('sys_id', user);
usr.query();
if (usr.next()) {
obj.manager = usr.manager.getDisplayValue();
obj.location = usr.location.getDisplayValue();
obj.mobile_number = usr.mobile_phone.getDisplayValue();
obj.username = usr.user_name.getDisplayValue();
obj.email = usr.email.getDisplayValue();
}
return JSON.stringify(obj);
},
type: 'FetchUserDetails'
});
If you have any feedback related to the scripting part, please write it in the comment box.
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[@kamaldeen3]

u a top G

[@Handlecj]

How to make onchange should also work for onload if i remove isloading from client script it's working but whenever form is saving everytime value is coming from backend even user changes the value how to resolve this

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