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What does the decodeURIComponent function do in Node.js?

easy📝 Conceptual Q2 of 15
Node.js - URL and Query String Handling
What does the decodeURIComponent function do in Node.js?
AEncodes a URL component by escaping characters
BDecodes an encoded URL component back to normal string
CEncodes the entire URL
DRemoves query parameters from a URL
Step-by-Step Solution
Solution:

  1. Step 1: Understand decodeURIComponent purpose

    decodeURIComponent reverses encoding done by encodeURIComponent, converting percent-encoded characters back to normal.

  2. Step 2: Identify the correct description

    It does not encode or remove parts of URL, only decodes encoded components.

  3. Final Answer:

    Decodes an encoded URL component back to normal string -> Option B

  4. Quick Check:

    Decoding URL components = decodeURIComponent() [OK]
Quick Trick: decodeURIComponent reverses encodeURIComponent encoding [OK]
Common Mistakes:
  • Thinking decodeURIComponent encodes instead of decodes
  • Confusing with decodeURI which decodes full URLs
  • Assuming it removes parts of the URL

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