promise: fetch, then,catch, finally

getUser.js

function getUser(userId) {
 const userData = fetch(`https://api.com/api/user/${userId}`)
   .then(response => response.json())
   .then(data => console.log(data.name))
   .catch(error => console.log(error))
   .finally(() => /*{ aviso de fim de carregamento }*/)
}

getUser(1); // "Nome Sobrenome"

Here is the equivalent with async/await:

async function getuser(userId) {
  try {
    const response = await fetch(`https://api.com/api/user/${userId}`)
    const user = await response.json();
  } catch(err) {
    console.error(err);
  }
}

async functions also have finally , the equivalent should like this:

async function getuser(userId) {
  try {
    const response = await fetch(`https://api.com/api/user/${userId}`)
    const user = await response.json();
  } catch(err) {
    console.error(err);
  }
 } finally {
// aviso de fim de carregamento
  }
}