Streamlined operator example

streamlinedOperator.js

/* The streamlined operator (“ ?. ”) acts as a nullish coalescing operator. It checks if 
 * the preceding value is “ null ”or “ undefined ” before attempting to access the next 
 * property. This simplifies conditional checks and streamlines your code, making it more 
 * readable and less error-prone.
 */
async function getUser(userId) {
  const user = await db.getUser(userId);
  // Traditional approach (prone to errors with undefined values)
  if (user && user.profile && user.profile.avatarUrl) {
    return user.profile.avatarUrl;
  } else {
    return null;
  }
  // Approach using the streamlined operator
  return user?.profile?.avatarUrl;
}