title: jQuery has deprecated synchronous XMLHTTPRequest
body: <p>Like many others, my website is using jQuery. When I open the developer tools, I see a warning that says that XMLHTTPRequest is </p>
  
  <blockquote>
    <p>deprecated because of its detrimental effects to the end user's experience.</p>
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  <p>I went on and read part of the <a href="https://xhr.spec.whatwg.org/" rel="noreferrer">documentation</a>, but it was fairly technical. Can someone explain the consequences of shifting from XMLHTTPRequest to WHATWG in simple terms? It says it happened in 2012. </p>
  
  <p>Also, the documentation says that Synchronous XMLHttpRequest outside of workers is in the process of being removed from the web platform, when that happens, if a user agent had them in a service, do they need to modify their existing code?</p>