solved task#2270
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nvkoff
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Jun 1, 2026
nvkoff
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- DEMO LINK
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Review Summary
Your implementation successfully meets the core requirements. The code correctly parses population data from the DOM, handles comma removal during number conversion, calculates both total and average population values, and formats the output with toLocaleString(). There are two non-critical issues to be aware of: First, there's an ESLint function-paren-newline violation on line 7 which is auto-fixable by running npx eslint --fix src/scripts/main.js. Second, while not required by the task, adding explicit isNaN() validation before number conversion would make the code more robust against malformed input data—this is a best practice improvement rather than a functional requirement since the expected input format should contain valid numbers. Overall, your solution is complete and functional. The checklist items are substantially met, and these minor improvements can be addressed separately.
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Footnotes
| const populations = Array.from(populationElements).map(el => | ||
| Number(el.textContent.replace(/,/g, '')) |
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Add validation to check if the string can be converted to a valid number before parsing. Use isNaN() or validate that Number() result is not NaN. Invalid entries should be filtered out or handled appropriately to avoid affecting total/average calculations.
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Review Summary
Your implementation successfully fulfills all core requirements for the task. The code correctly parses population data from DOM elements using querySelectorAll(".population"), properly converts string values to numbers while handling comma removal and NaN cases, calculates both total and average values using reduce() and division, and formats the output using toLocaleString() with Math.round() for the average. All checklist items have passed, and no critical issues remain. The README.md has been updated with your demo link. Great work on completing this task!
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