[Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimen...

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https://q.cnblogs.com/q/70126/

jquery - JavaScript console.log causes error: "Synchronous XMLHttpRequest on the main thread is deprecated..." - Stack Overflow
https://stackoverflow.com/questions/24639335/javascript-console-log-causes-error-synchronous-xmlhttprequest-on-the-main-thr

關於chrome控制檯警告：Synchronous XMLHttpRequest on the main thread終極解決辦法_javascript_小北哥哥和北媽-CSDN博客
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Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to_javascript_xujingcheng123的博客-CSDN博客
https://blog.csdn.net/xujingcheng123/article/details/88713385

Ajax.html:35 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org - 帥哥天下9 - 博客園
https://www.cnblogs.com/liveoutfun/p/8806809.html