Solving the undefined Problem with req.params in Express.js

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In today’s post, we’ll uncover why this happens and how to fix it, ensuring your dynamic routes work as intended.

The Issue at Hand

Consider the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

Why Does This Happen?

How to Fix It

Step-by-Step Solution

To resolve this issue, you simply need to change the order of the parameters in your route handler from:

[[See Video to Reveal this Text or Code Snippet]]

to:

[[See Video to Reveal this Text or Code Snippet]]

Here’s the Updated Code

After making the change, your code should look like this:

[[See Video to Reveal this Text or Code Snippet]]

Explaining the Changes

Conclusion

If you follow these guidelines, you’ll avoid the common pitfall of encountering undefined when accessing route parameters in your Express applications.

Happy coding!