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Given a URL string with encoded components, how can you decode only the query parameters safely in Node.js?

hard📝 Application Q9 of 15
Node.js - URL and Query String Handling
Given a URL string with encoded components, how can you decode only the query parameters safely in Node.js?
AUse decodeURI on the entire URL string
BUse decodeURIComponent on the entire URL string
CSplit the URL at '?' and decode each query parameter with decodeURIComponent
DReplace all '%20' with spaces manually
Step-by-Step Solution
Solution:

  1. Step 1: Understand URL structure

    The query parameters come after '?' and should be decoded individually.

  2. Step 2: Decode query parameters safely

    Split at '?', then decode each parameter with decodeURIComponent to avoid errors.

  3. Final Answer:

    Split the URL at '?' and decode each query parameter with decodeURIComponent -> Option C

  4. Quick Check:

    Decode query params individually with decodeURIComponent [OK]
Quick Trick: Split URL, decode each query param with decodeURIComponent [OK]
Common Mistakes:
  • Decoding entire URL with decodeURIComponent causing errors
  • Using decodeURI which may not decode params fully
  • Manual string replacements instead of decoding

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