InServiceNow,Client Scriptsrun on the client-side (browser) andmodify form behaviordynamically.
Tovalidate form data before submission, you must use anonSubmit()Client Script.
Executes Before Form Submission
TheonSubmit() Client Scriptrunsjust before the form is submitted, allowing validation checks.
If an issue is found, you canprevent form submissionusingreturn false;.
Best for Data Validation
Can check ifrequired fieldsare filled.
Can enforcebusiness rules on the client-side.
Example: Preventing submission if the"Short Description"field is empty.
Why is "onSubmit()" the Correct Answer?
ExampleonSubmit()Client Script:functiononSubmit() {
varshortDesc = g_form.getValue('short_description');
if(!shortDesc) {
alert('Short Description is required before submitting.');
returnfalse; // Stops the form from being submitted
}
returntrue;// Allows form submission
}
A: onSubmission()Incorrect-This is not a valid ServiceNow Client Script type.
C: onLoadIncorrect-Runs when the form loads, butdoes not validate form submission.
D: onUpdate()Incorrect-Runs when a record is updated, but doesnot control form submission.
Incorrect Answer Choices Analysis:
ServiceNow Docs - Client Scripts Overview#Understanding Client Scripts
ServiceNow Docs - Using onSubmit() Client Scripts#Client Script Examples Official ServiceNow Documentation References: