add js or css to the head

[ialhamdazeez 0]

I have a question on how prestashop works with adding js or css the head.

I have programmed a module. my module register hook Header, create a js file, then add it to the header. But when I want to remove the js file from the header, my module just delete the file from the server. Is it a good approach ?  or should I use removeJS?

In orther word. When calling addJS method is the change permenant or temporary? 

[Nishith 74]

Hi..
Here is documentation 

https://devdocs.prestashop.com/1.7/themes/getting-started/asset-management/