Frontend Architecture — Complete Guide
Frontend Architecture — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of HTML Tutorial on Toolliyo Academy.
On this page
HTML Tutorial · Lesson 66 of 100
Frontend Architecture
Basics ✓ → Forms & semantics ✓ → APIs & performance → Projects
APIs & performance · 3 — HTML5, CSS/JS, security · ~10 min · HTML — with CSS & JavaScript
What is this?
Frontend architecture splits HTML structure, CSS presentation, and JS behavior into clear layers.
Why should you care?
MarkupVerse repos organize banking, SaaS, and shop skins from one shared pattern.
See it live — copy this example
Save as demo.html and open in your browser, or use Run Example below.
<!--
MarkupVerse layer map
/shell/index.html — landmarks only
/css/tokens.css — variables
/js/app.js — enhancement
-->
<body class="mv-app mv-app--ecommerce">
<header class="mv-shell__header"></header>
<main id="app-root" data-page="checkout"></main>
</body>Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- HTML owns structure and data hooks.
- CSS owns look.
- JS owns behavior — not all three in one file.
Practice next
- Sketch shell + tokens + app files.
- Use data-page on main.
- Keep header markup in HTML.
- Add mv-app--healthcare body class.
- Document layers in a comment block.
Remember
Separation of concerns. data-* hooks. Shared shell pattern.
MarkupVerse layer map
Team splits checkout HTML from theme CSS.
Outcome: E-commerce skin swaps without touching JS.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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