const urlArr = [
  "https://jsonplaceholder.typicode.com/todos/1",
  "https://jsonplaceholder.typicode.com/todos/2",
  "https://fffffjsonpldfaceholder.typicode.com/todos/3",
  "https://jsonplaceholder.typicode.com/todos/4",
  "https://fffffjsonplacehodfglder.typicode.com/todos/5"
];

const badLinks = []

const checkUrls = (urls => {
  urls.forEach(async (url, i) => {
    try {
      await fetch(url);
    } catch {
      sessionStorage.setItem(`url ${i}`, url)
    };
  });
  
  for (let i = 0; i <= urls.length; i += 1) {
    badLinks.push(sessionStorage.getItem(`url ${i}`))
  }
  
  sessionStorage.clear()
})

checkUrls(urlArr)
const result = badLinks.filter(Boolean)

console.log(result)