Accessibility (a11y) — Free App Development Tutorial

Learn Accessibility (a11y) in App Development with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Accessibility (a11y) in App Development with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated Sep 17, 2026

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Accessibility (a11y) in App Development

Web accessibility (a11y) ensures people with disabilities can use your app effectively using assistive technologies.

The WCAG (Web Content Accessibility Guidelines) define standards across four principles: Perceivable, Operable, Understandable, and Robust.

Semantic HTML (using <button> instead of <div onclick>, <label> for inputs) provides accessibility for free.

ARIA (Accessible Rich Internet Applications) attributes like aria-label, aria-hidden, and role enhance accessibility for complex UI patterns.

Keyboard navigation (Tab, Enter, Space, arrow keys) must work fully without a mouse for all interactive elements.

Accessibility (a11y) — Syntax

<!-- Bad: no semantics or label -->
<div onclick="submit()">Submit</div>

<!-- Good: semantic, labeled, keyboard accessible -->
<button type="submit" aria-label="Submit form">Submit</button>
<label for="email">Email address</label>
<input type="email" id="email" required aria-describedby="emailHelp" />
<span id="emailHelp">We'll never share your email.</span>

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