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JSON or XML for the interchange of data, and XSLT for XML manipulation; The XMLHttpRequest object for asynchronous communication; JavaScript to bring these technologies together; Since then, however, there have been a number of developments in the technologies used in an Ajax application, and in the definition of the term Ajax itself.
Program flow using asynchronous XHR callbacks can present difficulty with readability and maintenance. ECMAScript 2015 (ES6) added the promise construct to simplify asynchronous logic. Browsers have since implemented the alternative fetch() interface to achieve the same functionality as XHR using promises instead of callbacks.
Upload file; Special pages; Permanent link; Page information; ... Ajax (programming), Asynchronous JavaScript and XML, a method used in web application development, ...
Asynchronous JavaScript And XML. CAPTCHA. Completely Automated Public Turing Test to tell Computers and Humans Apart. CD-ROM. Compact Disc Read-Only Memory. DVD. Digital Versatile Disc. Fios ...
XML, JSON and JavaScript JsonML , the JSON Markup Language is a lightweight markup language used to map between XML (Extensible Markup Language) and JSON (JavaScript Object Notation). It converts an XML document or fragment into a JSON data structure for ease of use within JavaScript environments such as a web browser , allowing manipulation of ...
Thus the web developer can use Java code from JavaScript as if it were local to the web browser; whereas in reality the Java code runs in the web server and has full access to web server resources. For security reasons the web developer must configure exactly which Java classes are safe to export (which is often called web.xml or dwr.xml).
The browser makes an asynchronous request of the server, which may wait for data to be available before responding. The response can contain encoded data (typically XML or JSON) or Javascript to be executed by the client. At the end of the processing of the response, the browser creates and sends another XHR, to await the next event.
The event assignment and the event callback function definition are done in a single step in a single location in the code. jQuery also aims to incorporate other highly used JavaScript functionality (e.g. fade ins and fade outs when hiding elements, animations by manipulating CSS properties). The principles of developing with jQuery are: