error-handling.js

async function email(address) {
  try {
    // Do something asynchronous that may throw...
    await sendEmail({ to: address, from: 'noreply@domain.com', subject: 'Hello' });
  } catch(err) {
    if (err instanceof SomeCustomError) {
      elegantlyHandleError(err)
    } else {
      throw err
    } 
  }
}