What are the best practices for using async in TypeScript?

What are the best practices for using async in TypeScript?

When using async in TypeScript, it's important to handle errors properly, use appropriate return types, and avoid blocking the event loop.

Can you give me an example of error handling with async/await?

Sure! You can use try/catch blocks to handle errors in async functions. For example:

async function fetchData() {
  try {
    const response = await fetch('https://api.example.com/data');
    const data = await response.json();
    return data;
  } catch (error) {
    console.error('Error fetching data:', error);
  }
}

What about using Promise.all with async functions?

Using Promise.all allows you to run multiple async operations in parallel. Here's an example:

async function fetchMultipleData() {
  const [data1, data2] = await Promise.all([
    fetch('https://api.example.com/data1'),
    fetch('https://api.example.com/data2')
  ]);
  return [await data1.json(), await data2.json()];
}

Are there any performance considerations I should be aware of?

Yes, avoid using too many concurrent async operations as it can lead to performance issues. Use throttling or batching when necessary.