Abbreviated as XHR, XMLHttpRequest
is a set of APIs
that can be used by Web browser
and other text data to and from a Web server
. XMLHttpRequest works by establishing a communication channel between a Web page’s client-side and server-side. XMLHttpRequest can be used to fetch data in a number of formats including XML, HTML, JSON
or plain text. Examples of applications using XMLHttpRequest include Google Gmail and Google Maps. Browsers that support XMLHttpRequest include newer versions of Internet Explorer, Mozilla and Safari.