What is HTTP - W3Schools
https://www.w3schools.com/whatis/whatis_http.asp
WEBDespite the XML and Http in the name, XHR is used with other protocols than HTTP, and the data can be of many different types like HTML, CSS, XML, JSON, and plain text. The XHR Object is a Web Developers Dream, because you can: Update a web page without reloading the page; Request data from a server - after the page has loaded
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