Call Third Party JS from VBCS

Summary

I want to call a third party js method in my page then how can i import that JS. Suppose the url for that js is "http://xyz.com/utility/test.js"

Content

I want to call a third party js method in my  page then how can i import that JS. Suppose the url for that js is "http://xyz.com/utility/test.js"

How can i include this JS.. I can take the code and make that work but in future if any new method is added by third party then i wont be able to use that method without updating my whole JS once again.