If a dynamic Web page is enhanced with the use of Ajax, users may they have problems using this page?
The webmaster must weigh the benefits of the asynchronous mode, and these disadvantages to choose whether to use Ajax.
Ajax makes the interaction with the server smooth thanks to the asynchronous mode: it is possible to load data without reloading the page.
So a Web application runs as a local application.
Ajax must be used wisely and not systematically. Dynamic content should represent a small portion of the page and preferably some purely aesthetic elements.
New browsers include the inclusion of dynamic content for navigation.