Synchronous XMLHttpRequest on the main thread is deprecated
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zhe1ka commented
when i have several open tabs and when the connection is going to be disconnected in the tabs which aren't in focus I have the warning:
"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/."
together with that i see the comment in the code that this behaviour is intended. The biggest problem that time-to-time it blocks the page (which is not in focus) completely for seconds or minutes. Can it be changed to async way of executing somehow?
