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Refactor duplicated code across SCSS, JavaScript, and HTML layouts #95

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Copilot AI commented Oct 24, 2025 •
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Overview

This PR eliminates code duplication throughout the codebase, reducing repetitive patterns by ~50 lines while maintaining all existing functionality. The changes improve maintainability and follow DRY (Don't Repeat Yourself) principles.

Changes

SCSS Refactoring

Created reusable transition mixin (_sass/main.scss)

@mixin transition-base($speed: var(--base-trans)) {
  transition: all $speed ease-in-out;
}

This mixin replaces 5 instances of duplicated transition declarations across _sass/_layout.scss:

  • .home-navigation a
  • .home-intro-scroll
  • .home-work-grid__project-description h2 a
  • .post a and .post a:before
  • .blog-list-item a span

Consolidated CSS selectors

  • Merged ::selection and ::-moz-selection into a single rule (previously duplicated the same 3 properties)
  • Nested .post-meta a and .post-footer a color declarations within parent selectors
  • Fixed misleading duplicate comment "HOME: Intro" → renamed to "POST: Article Layout"

JavaScript Refactoring (assets/js/s.js)

Extracted helper function to eliminate duplication:

function getTime() {
  return "now" in window.performance ? performance.now() : new Date().getTime();
}

This replaces 2 instances of the same ternary expression.

Simplified conditional logic:

  • Added early return pattern when arrow element doesn't exist
  • Removed redundant null checks after early exit (3 instances of if (arrow && ...) → if (...))
  • Changed let to const for immutable variables

HTML Layout Refactoring

Eliminated HTML boilerplate duplication:

Before, _layouts/home.html duplicated the entire HTML structure from default.html:

<!DOCTYPE html>
<html lang="en">
{% include head.html %}
<body class="home">
  <!-- content -->
</body>
</html>

After, it now extends the default layout:

---
layout: default
body_class: home
---
<!-- content only -->

Updated _layouts/default.html to support optional body classes via body_class parameter, making it flexible for all layouts.

Testing

  • ✅ JavaScript syntax validated with Node.js
  • ✅ Code review completed with no issues
  • ✅ CodeQL security scan passed with zero vulnerabilities
  • ✅ All changes maintain backward compatibility

Impact

  • Maintainability: Future changes to transitions, time functions, or HTML structure only need to be made in one place
  • Consistency: Using shared mixins and helpers ensures consistent behavior across the site
  • Readability: Less code duplication makes the codebase easier to understand and navigate
Original prompt

Find and refactor duplicated code

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

Copilot AI self-assigned this Oct 24, 2025
Copilot AI changed the title [WIP] Refactor duplicated code in the project Refactor duplicated code across SCSS, JavaScript, and HTML layouts Oct 24, 2025
Copilot AI requested a review from adrianmg October 24, 2025 18:17
Copilot finished work on behalf of adrianmg October 24, 2025 18:17
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