Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/
Ní mholtar XMLHttpRequest sioncronach a dhéanamh sa bpríomhshnáithe mar gheall ar na drochéifeachtaí ar eispéireas an úsáideora. Tuilleadh eolais: http://xhr.spec.whatwg.org/