Responsive Testing — Complete Guide
Responsive Testing — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of HTML Tutorial on Toolliyo Academy.
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HTML Tutorial · Lesson 86 of 100
Responsive Testing
Basics ✓ → Forms & semantics ✓ → APIs & performance ✓ → Projects
Projects · 4 — MarkupVerse builds · ~10 min · HTML — Testing & Deployment
What is this?
Responsive testing checks layouts at multiple viewports — mobile, tablet, desktop breakpoints.
Why should you care?
MarkupVerse nav collapses to a menu button below 768px on every product skin.
See it live — copy this example
Save as demo.html and open in your browser, or use Run Example below.
<header class="mv-header">
<button type="button" class="mv-menu" aria-expanded="false" aria-controls="nav">Menu</button>
<nav id="nav" class="mv-nav" hidden>
<a href="/dashboard">Dashboard</a>
<a href="/settings">Settings</a>
</nav>
</header>
<style>
@media (min-width: 768px) { .mv-menu { display: none; } #nav { display: flex !important; } }
</style>Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- Test 320, 768, 1280 widths.
- aria-expanded tracks menu state.
- hidden toggles mobile nav.
Practice next
- Resize DevTools device modes.
- Toggle menu at 375px.
- Verify nav visible at 1024px.
- Add landscape iPhone test.
- Check touch target 44px min.
Remember
Test key breakpoints. Menu a11y state. Real device spot check.
MarkupVerse responsive nav
User opens menu on phone.
Outcome: Nav expands; desktop shows links inline.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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