In this lesson we begin learning ajax – asynchronous Javascript and XML. This technology allows to exchange data without page reload. We’ll discuss ajax in the javascript context and jquery context.

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Why do you need this library? Google Chrome (as of version 64) can not estimate the total download size of XMLHTTPRequests when content-encoding: gzip is set, even if the content-length header is set.

What is AJAX (Asynchronous JavaScript and XML)? AJAX (Asynchronous JavaScript and XML) is a technique aimed at creating better and faster interactive web apps by combining several programming tools, ...

XMLHttpRequest (XHR) is a JavaScript object that allows you to send and receive data from a server without reloading the page. It is widely used in web applications to create dynamic and interactive ...