XMLHttpRequest
Web API to transfer data between a web browser and a web server
XMLHttpRequest
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. The methods allow a browser-based application to send requests to the server after page loading is complete, and receive information back. 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.
Read on Wikipedia · Image IETF HTTP Working Group (HTTPbis), Public domain
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