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AJAX

>>>>>>>>>>>>>>>>>>>>>>>>>>Dynamic web applications whose content reacts to user input are a matter of course today. For the realization of dynamic websites, web designers have various concepts at their disposal. Ajax is one of them.

What is Ajax?

Ajax is a programming concept that makes it possible to change the content of web pages in the browser without having to reload the entire page from the browser. The abbreviation stands for “Asynchronous JavaScript and XML” and means in German “asynchronous JavaScript and XML”.

How Ajax works

Ajax allows requests to the server to be started in the background. These requests are triggered by a XMLHttpRequest. It is not necessary for a web page to be reloaded by the browser to display the requested content. Often only small amounts of data are involved, so there is no waiting time for users, but the user experience is significantly improved.

What are the advantages and disadvantages of using JavaScript and XML

The advantage is that websites can respond faster to input from users. The disadvantage is that because of the reloaded content there are no more documents with a defined and therefore addressable content. Another disadvantage is that if a user wants to return to a previously viewed content, this is no longer possible as usual. The changes generated by JavaScript are not saved in the browser history. For the browser, the page and its content have not been replaced. Thus, the address of the page has not changed for the browser.


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