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name: clean-up-comments description: "Use when reviewing templates, rendered HTML, or shared components related to Remove comments and debug code in production. Validate the final browser-facing markup, not just the source framework abstraction." metadata: category: html priority: medium difficulty: beginner estimatedTime: "10" source: frontendchecklist.io url: https://frontendchecklist.io/rules/html/clean-up-comments

Remove comments and debug code in production

Comments expose internal logic to attackers, increase file size, and can leak sensitive information like API endpoints, credentials, or system architecture.

Quick Reference

• Remove TODO, FIXME, DEBUG comments before production
• Keep accessibility and legal comments
• Configure build tools to strip comments automatically
• Review for sensitive data leaks in comments

Check

Review this HTML code for unnecessary comments, debug code, console logs, and temporary markup that should be removed before production deployment.

Fix

Remove all development comments, debug code, unused markup, and temporary elements from the HTML before deploying to production.

Explain

Explain why cleaning up code before production is important for security, performance, and professional presentation of web applications.

Code Review

Review templates, server-rendered HTML, and shared components that output markup related to Remove comments and debug code in production. Flag exact elements, attributes, and routes where the rendered HTML violates the rule.

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For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/rules/html/clean-up-comments