My domain name: app.xyz.com

My script file load from: app.xyz.com/abc.js

Client domain name: abcd.com

In client domain(abcd.com) my script tag(app.xyz.com/abc.js) is loaded.

I want to access my domain(app.xyz.com) cookie inside my script file(app.xyz.com/abc.js) which is loaded in client domain(abcd.com).

How can I achieve this task?