How to set a value on a field of the form or record in ServiceNow?

In this tutorial, you will learn how can you set a value on a field of a form on different conditions and scenarios.

Setting the field value on load of the form

Scenario: When incident form is loaded then the value of Caller field should populated with logged in user.

Solution : This type of requirement can be achieved with Client Script as it needs to be set when form is loaded in the browser.

Type of Script : Client Script

Name : Populate Caller on the Incident

Table : Incident

UI Type : All

Type : OnLoad

Active : True

Global: True

Script :

function onLoad() {
 //Type appropriate comment here, and begin script below


 if (g_form.isNewRecord()) {


 var currentUser = g_user.userID;


 g_form.setValue('caller_id', currentUser);
 }
}

Setting the field value on change of a field

Scenario: When incident form is loaded then the Assignment Group should be populated with Network group.

Solution : This type of requirement can be achieved with Client Script as it needs to be set when value oof Category field changes to Hardware.

Type of Script : Client Script

Name : Populate Caller on the Incident

Table : Incident

UI Type : All

Type : OnChange

Field: Category

Active : True

Global: True

Script :

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
 if (isLoading || newValue === '') {
 return;
 }


 //Type appropriate comment here, and begin script below
 if (newValue == 'hardware') {
 //Setting SYSID OF Network Group
 g_form.setValue('assignment_group', '287ebd7da9fe198100f92cc8d1d2154e'
 ,'Network'); 
 }


}