Need free hosting with ajax support, is there one?

look at what is written, the controller that jerks ajax.
a) it's not in the example and need to write himself
b) for example is written in php and need hosting with PHP

You can even put static json boilerplate Ajax calls "works" on a clean apache

ajax did not display the output(possibly not support ajax).

how do you tell (what error)?

hosting ajax enabled

ajax is not a server service is a way to build the application (use js).

Ajax it on the client side not the server

beget free