Use Below onLoad Client Script:- It will work after saving the record
function onLoad() {
//Type appropriate comment here, and begin script below
if (g_form.getValue('state') == '3') {
var fields = g_form.getEditableFields();
for (var x = 0; x < fields.length; x++) {
// by default the mandatory fields can not be set as readonly
// Make the field non-mandatory before making it readonly
g_form.setMandatory(fields[x], false);
g_form.setReadOnly(fields[x], true);
}
}
}
Please mark my answer as helpful/correct if it resolves your query.
Regards,
Gunjan Kiratkar
Consultant - ServiceNow, Cloudaction
Rising Star 2022
