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jk-npc
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Mar 5, 2026
jk-npc
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- DEMO LINK
mateacademy-ai-mentor
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Review Summary
I am requesting changes because a critical issue is preventing your script from running. While your calculation and formatting logic is well-written, the way you select elements from the DOM causes a runtime error.
You're using document.querySelector('.population'), which only returns the very first matching element. The code then attempts to iterate over this single element as if it were a list, which results in a TypeError and stops the script from executing any further.
To fix this, you need to use a method that returns all matching elements. Please look into document.querySelectorAll(), which will provide a collection that you can loop through. Once you make this adjustment, the rest of your excellent logic should work as intended!
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Important
Fix the issues, commit the changes, and then re-request my review using the Re-request review button2 in the Reviewers tab.
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Footnotes
src/scripts/main.js
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| 'use strict'; | ||
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| // write your code here | ||
| const populations = document.querySelector('.population'); |
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The document.querySelector() method returns only the first element that matches the specified selector. To retrieve all elements with the class population, you need to use a method that returns a collection of elements, like document.querySelectorAll().
mateacademy-ai-mentor
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Review Summary
Excellent work on this pull request! I'm happy to approve your solution. You've successfully addressed the feedback from the previous review by using document.querySelectorAll to correctly gather all the population data. Your code now perfectly calculates the average and total values and updates the display as required. All requirements have been met. Great job!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
Footnotes
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