Per aspera ad astra. AJAX also had a number of obstacles on its way to prominence. No sooner had the issues of non-support and incompatibility been resolv and ajax presentations. Sart to take off, but there was a problem with addressing the content. Was impossible to create a link to other than the default content, and it was also impossible to get to the previous content using the Back button.
Although the content chang
Was still the same page with the same address! But even these problems were promptly resolv. And that by assigning a so-call anchor to each certain content. Thanks to it, each such content has its own addres, which can be referenc and the request content will then be generat according to the part of the address behind the grid. At the same time, this caus the opposite problem – if the Ajax application changes the address content too quickly, it fills the browser history with ballast.
However, it was necessary to deal singapore phone number data with other difficulties, the solution of which was already significantly more complicat.
Also read the first part of the series on server-browser communication: Ajax at a glance .
Cross-origin requests
The scope of AJAX is limit by the same origin policy. The same origin policy ) – this means that the page must. From the same server from which it draws data, and the port and protocol must also be the same. In most cases, this restriction is not a problem. Sometimes, however, the purpose of the application requires the page to be able to communicate with multiple servers (or multiple services on different domains), which this limitation prevents. Is there any way around it? Yes, the site can communicate with only one server, but it can communicate with all others. Through this one server, the sharing a framework that will enable you to keep application can access data sources from other servers. However, there is also a direct solution – it has the abbreviation CORS (Cross-Origin Resource Shar). It is essentially an additional protocol that modifies the current rules of communication between the browser and the bw lists server in such a way that data sources outside the home domain are made available.