Solution: Bridge Callback and Promise APIs
Understand how to implement an adapter that bridges callback and promise APIs, allowing modern async/await calls to interact with legacy callback-style Node.js database clients. This lesson helps you create maintainable, clean code by standardizing interfaces across different asynchronous styles.
We'll cover the following...
We'll cover the following...
Solution explanation
Lines 2–12: We simulate a legacy database client using callbacks.
It exposes a
query(sql, callback)method.If the SQL string contains
"error", it triggers a failure.Otherwise, it calls the ...