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XMLHttpRequest (XHR) is an API in the form of a JavaScript object whose methods transmit HTTP requests from a web browser to a web server.[1] The methods allow a browser-based application to send requests to the server after page loading is complete, and receive information back.[2] XMLHttpRequest is a component of Ajax programming. Prior to Ajax, hyperlinks and form submissions were the primary mechanisms for interacting with the server, often replacing the current page with another one.[2]
- ^ Mahemoff, Michael (2006). Ajax Design Patterns. O'Reilly. p. 92. ISBN 978-0-596-10180-0.
Javascript lacks a portable mechanism for general network communication[.] ... But thanks to the XMLHttpRequest object, ... Javascript code can make HTTP calls back to its originating server[.]
- ^ a b Mahemoff, Michael (2006). Ajax Design Patterns. O'Reilly. p. 92. ISBN 978-0-596-10180-0.