JavaScript console.log causes error: “Synchronous XMLHttpRequest on the main thread is deprecated…”

Question

I have been adding logs to the console to check the status of different variables without using the Firefox debugger.

However, in many places in which I add a

Answer 1

This is solved in my case.

JS

$.ajaxPrefilter(function( options, original_Options, jqXHR ) {
    options.async = true;
});

This answer was inserted in this link

https://stackoverflow.com/questions/28322636/synchronous-xmlhttprequest-warning-and-script