How to rewrite the code so that it can be used in a loop?

Question

JavaScript

var onLinedsasd=(async()=>{
  if(navigator.onLine){
    var date=+new Date();
    var res=await fetch('/favicon.ico?_='+date);
    var ret=await res.headers.get('Content-Type').split('/')[0]=='image';
  }else{
    ret=navigator.onLine;
  }
  return ret;
});

I would like to rewrite such code xn, tu could be used in the loop condition. for example

if(onLinedsasd()){
//...
}else{
//...
}

Is it possible?

Answer 1

Because await is only valid inside async functions and in the global scope of a module (c) google translate