Set Default for Single Line text field based on dropdown field selection

Set Default for Single Line text field.groovy

const customerFacingVarbatimField = getFieldById("customfield_27449");
const customerFacingVarbatimFieldValue = customerFacingVarbatimField.getValue()?.value;

const responseField = getFieldById("customfield_20579");

const responses = {
    "Fix Released": "The issue has been fixed in [Version X.Y.Z] released on [Date]. Please upgrade to apply the fix.",
    "Fix in Progress": "Actively working on a fix, expected in our upcoming patch [on Date].",
    "Under Investigation": "The issue/request is under investigation. Updates will follow.",
    "Workaround Provided": "[Share workaround].",
    "Added to Backlog": "Logged for future consideration. We'll keep you posted.",
    "Known Limitation": "Known product limitation. Under review for a future release.",
    "Already Supported": "This feature exists. Access it via: [Instructions or link].",
    "Answer Provided": "Requested info: [Add details].",
    "More Information Needed": "Please clarify or provide more details on [specific part].",
    "Reject": "We regret to inform you that this request has been rejected. [Add reason if needed]."
};

if (customerFacingVarbatimFieldValue === "Other") {
    responseField.setReadOnly(false);
    responseField.setValue(""); // Optional: clear the field so the user can enter freely
} else if (responses.hasOwnProperty(customerFacingVarbatimFieldValue)) {
    responseField.setReadOnly(true);
    responseField.setValue(responses[customerFacingVarbatimFieldValue]);
} else {
    // Optional: default behavior for unknown values
    responseField.setReadOnly(false);
    responseField.setValue("");
}