XMLHttpRequest
WEB API IN THE FORM OF AN OBJECT, PROVIDED BY THE USER AGENT, WHOSE METHODS TRANSFER DATA BETWEEN A USER AGENT AND A WEB SERVER, OFTEN FOR CONTINUALLY MODIFYING A LOADED WEB PAGE; DESPITE THE NAME, CAN BE USED WITH NON-HTTP PROTOCOLS OR NON-XML DATA
XMLHTTPRequest; XHR; Xmlhttp; XmlHttpRequest; Xmlhttprequest; HTTP-XML; XML-HTTP; XMLHTTP; XMLHttp; IXMLHTTPRequest; NsIXMLHttpRequest; Fetch API
XMLHttpRequest (XHR) is an API in the form of an object whose methods transfer data between a web browser and a web server. The object is provided by the browser's JavaScript environment.