XHR 介绍
This tiny plugin provides a registry for different xhr implementations to co-
exist.
It requires jQuery 1.3/1.2.7 with its new feature, the ‘xhr’ ajax
setting.
If you want to provide a new implementation, you need to do this:
jQuery.xhr.register( 'my_xhr', function( settings ){ return new MyXhrImplementation( settings ); });
The argument settings is the settings object used by jQuery.ajax.
To use it, you do:
$.ajax({ url:'...', transport:'my_xhr', // ... });
The default implementation is used by default (unless it’s overriden with
ajaxSetup) and it’s called ‘xhr’.