Resolving undefined Issues in Node.js Express Post Requests: A Clear Solution

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Understanding the Issue: Undefined Values in Post Requests

The Challenge

Situation: When attempting to console log values retrieved from the request body in your Express app, instead of getting the expected user data (like username and password), you get undefined.

Example Code Fragment:

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Identifying the Cause

The root of the problem lies in how data is sent in the request. In your testing scenario, you're using query parameters in the URL:

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The Solution

To fix this, we need to align how you're sending data with how you're retrieving it. Here are the two approaches you can take:

1. Adjusting the Data Retrieval Method

If you continue to send data as query parameters in the request URL, you should change the way you retrieve the parameters in your Express route:

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2. Sending Data in the Request Body

Example: Sending Data in JSON Format

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Then, you can maintain your original method of retrieving these values:

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Conclusion