I want to make custom code OR want to build APP for shopify store where I want to allow extra product feature with additional prices. For example I am selling one main product as pizza with addition toppings add-ons with extra prices.
Product add-ons can be selected by checkbox and final product price should get change based on add-ons selection.
I searched almost all places, but all i am getting is third party APP suggestions.
Those apps are great but I don't have option to use third party apps from shopify store owner.
My options are :
Can anyone please guide me for this requirements?? What and how to do this with sample code tutorial for reference.