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How can you modify a centralized error handler to handle both synchronous and asynchronous errors in Express?

hard📝 Application Q9 of 15
Node.js - Error Handling Patterns
How can you modify a centralized error handler to handle both synchronous and asynchronous errors in Express?
AOnly use try-catch blocks inside route handlers
BIgnore async errors as they are handled automatically
CUse a wrapper function that catches async errors and passes them to next()
DUse multiple error handlers for sync and async separately
Step-by-Step Solution
Solution:

  1. Step 1: Understand async error handling in Express

    Express does not catch async errors automatically; they must be passed to next().

  2. Step 2: Use wrapper to catch async errors

    A wrapper function can catch async errors and call next(err) to forward them.

  3. Final Answer:

    Use a wrapper function that catches async errors and passes them to next() -> Option C

  4. Quick Check:

    Async errors need wrapper to forward to error middleware [OK]
Quick Trick: Wrap async routes to catch errors and call next(err) [OK]
Common Mistakes:
  • Relying only on try-catch inside routes
  • Ignoring async errors
  • Using separate error handlers unnecessarily

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