I have a function to save values on a few pages.

If I try to return them on another page and writeln them it works. But it gives out the first value 1 time, the second value 2 times, the third value 3 times and so on. I can't figure out where the problem is.

let aus = "";
let h1 = localStorage.getItem("h1");
   
for (i=0; i<localStorage.length; i++)  {  
  key = localStorage.key(i);  
  let v = localStorage.getItem(key);
  window.document.writeln(aus +=  "<div id='favInfo'><a href='" + v + "' target='blank'>" + localStorage.key(i) +"</a></div>")
  console.log(localStorage);
}