Only item code without name how to this

Ex:
Item code:-IT001-demo-item

instead of this i want to show the demo-item only is this possible …need help for the same …

change the id name by expression or naming_series

any example for child table item code

Ex:
Item code:-IT001-demo-item

instead of this i want to show the demo-item in sales order only is this possible …need help for the same complete example

I encountered the same issue. Try using the following script:

frappe.form.link_formatters['Item'] = function(value, doc) {
    if (doc.item_code && doc.item_name !== value) {
        return doc.item_code;
    } else {
        return value;
    }
};