Disappear the code in text erea in server script


disappear the code in text erea in server script
but when edit it

Installed Apps

ERPNext: v15.14.6 (version-15)
Frappe Framework: v15.15.0 (version-15)
Frappe HR: v15.12.0 (version-15)
custom app: v0.0.1 (develop)

Why would want to add Client Script when this feature for checking for duplicate is available built in?

see here Customer Name is not Unique - #2 by NCP

As suggested just set the Customer Naming to Customer Name.

That is all what should be required.

okey
but i asked about [Disappear the code in text area in server script]