async-await-error-handling.js

// promise error handling
function fetchAndUpdatePosts() {
  fetchPosts()
    .then((posts) => {
      updatePosts(posts)
        .catch((err) => {
          console.log('error in updating posts');
        });
    })
    .catch(() => {
      console.log('error in fetching posts');
    });
}


// async/await error handling
async function fetchAndUpdatePosts() {
  let posts; 
  
  try {
    posts = await fetchPosts();
  } catch {
    console.log('error in fetching posts');
  }
  
  if (!posts) {
    return;
  }
  
  try {
    await updatePosts();
  } catch {
    console.log('error in updating posts');
  }
  
// cleaner way but generic error handling
async function fetchAndUpdatePosts() {
  let posts; 
  
  try {
    posts = await fetchPosts();

    doSomethingWithPosts(posts); // throws an error
  } catch {
    // Now it handles errors from fetchPosts and doSomthingWithPosts.
    console.log('error in fetching posts');
  }
}  
  
// specific error handling
async function fetchAndUpdatePosts() {
  const posts = await fetchPosts().catch(() => {
    console.log('error in fetching posts');
  });
  
  if (posts) {
    doSomethingWithPosts(posts).catch(() => {
    console.log('error in do something with posts');
  });
  }
}