you can call asynchronous interfaces across domains through jsonp. What"s the problem if all or a large number of pages request data through jsonp?
I am a front-end, and I am often asked by my back-end developer colleagues that if you have transferred interface A (jsonp), across domains, then you can adjust interface B yourself, so I won"t encapsulate it for you. I certainly don"t recommend it, but when I think about it, I don"t know what the real problem is. Hope that Daniel who has studied it can analyze it from http or performance, thank you!