Posture (Ajax)

Ajax is inherently impossible to cross-domain.

But Ajax and JSONP are actually different things in nature. The core of Ajax is to obtain non-page content through XMLHttpRequest, while the core of JSONP is dynamic add <script> tag to invoke the JS script provided by the server.

(AJAX) does not have access to content other than this domain. However, static resources are not restricted by the domain policy, can load arbitrary domain scripts, styles, pictures and other static resources, JSOP is to use this principle to achieve cross-domain data acquisition.

Posture (Ajax)