SVG — Complete Guide

SVG — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of HTML Tutorial on Toolliyo Academy.

8 min read Updated 8/22/2026

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HTML Tutorial · Lesson 14 of 100

SVG

Basics → Forms & semantics → APIs & performance → Projects

Basics · 1 — Structure & media · ~6 min · HTML — Media & Content

What is this?

SVG is vector markup for icons and illustrations that scale crisply.

Why should you care?

MarkupVerse UI icons are inline SVG or img src to .svg for theming and sharpness.

See it live — copy this example

Save as demo.html and open in your browser, or use Run Example below.

<svg width="24" height="24" viewBox="0 0 24 24" aria-hidden="true">
  <path fill="currentColor" d="M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm1 14h-2v-2h2v2zm0-4h-2V6h2v6z"/>
</svg>
<img src="/icons/check.svg" alt="">

Run Example »

Edit the code below and click Run to see the result in Toolliyo’s live editor.

Code

Result

What happened?

Inline SVG can use currentColor.
Decorative SVGs get aria-hidden or empty alt on img.

Practice next

Paste an inline icon.
Color it with CSS color.
Swap to img svg.
Add focusable="false" on decorative inline SVG.
Use a sprite later.

Remember

Vectors scale. currentColor theming. Hide decorative from a11y tree.

MarkupVerse alert icon

Inline SVG warning icon.

Outcome: Sharp on retina; inherits text color.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Junior Detailed

Explain JavaScript in the context of HTML.

Short answer: JavaScript runs single-threaded with an event loop. Closures capture lexical scope; promises/async handle I/O without blocking the UI thread. Real-world example (ShopNest) On the ShopNest storefront UI, thi…

Mid Detailed

What are common mistakes teams make with Components when using HTML?

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define Component…

Senior Detailed

How would you debug a production issue related to State in a HTML application?

Junior Detailed

Describe a real-world scenario where Performance mattered in a HTML project.

All course Q&A Practice exams

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