Currently I am developing an app that adds a floating image to a Shopify storefront. This is done by ScriptTag using .js hosted under my domain. However, I have to pass a variable to this .js file and that variable is different for every Shopify store.
Is there a better way than passing asdfasf.js?parameter=afadf? Or is there a way to add a .js file to user's store and make sure it applies to all themes?
Any help is much appreciated!