Introduction
Accessibility should be a top priority throughout development, especially during the coding and testing phases. Like everything else in software engineering, detecting and resolving issues early, not just bugs but any deviations from best practices, prevents expensive complications down the line.
Coding for accessibility should be viewed as another engineering principle that front-end engineers incorporate continuously while developing. It should not be viewed as an add-on task or a final consideration but as part of a holistic effort to create efficient, functional, and accessible products.
- DRY: Don’t Repeat Yourself
- KISS: Keep It Simple, Stupid
- YAGNI: You Aren’t Gonna Need It
- CARE: Code for Accessible and Responsive Experiences
CARE means treating accessibility as an integral part of the development process from the start, ensuring that products are usable by as wide an audience as possible before testing begins.
The Importance of CARE
This principle advocates for integrating accessibility from the initial stages of web development. If you’re beginning to explore accessibility in a developer context, the Web Content Accessibility Guidelines (WCAG) are the fundamental starting point.
Including accessibility in your coding practices widens your user base by making applications accessible to individuals with disabilities and enhancing everyone’s overall experience. When I led the accessibility initiative at Pluralsight Flow, the goal wasn’t compliance for its own sake. It was making sure the product actually worked for every user who depended on it.
Keeping Accessibility in Mind While Coding
Frontend developers play a significant role in determining how applications look and function. A well-designed and properly developed interface goes a long way in ensuring that a website is accessible and provides a good user experience.
Color Contrast
The WCAG recommends a minimum color contrast ratio of 4.5:1 for normal text to ensure that text stands out against its background, which is crucial for users with visual impairments.
/* Ensuring good contrast for readability */
body {
color: #444444; /* Dark grey text */
background: #FFFFFF; /* White background */
}Typography
Typography should be easy to read and scalable. Scalable fonts allow users to adjust text size based on their needs and device settings.
/* Ensure font-size is no smaller than 12px */
/* Use relative size so font can be scaled */
p {
/* Ensures min size of 12px but scales with the viewport width */
font-size: max(12px, 2vw);
}Responsive Coding
Responsive web applications are usable on any device, from desktops to smartphones. Media queries and relative units help achieve a flexible and accessible layout.
/* Mobile-first CSS */
/* Easier to scale up and add complexity for larger screens */
body {
margin: 0;
padding: 10px;
font-family: 'Arial', sans-serif;
font-size: 16px;
}
p {
line-height: 1.5;
}
/* Tablets and larger (600px+) */
@media (min-width: 600px) {
body { padding: 20px; }
p { font-size: 18px; }
}
/* Desktops and larger (1024px+) */
@media (min-width: 1024px) {
body { padding: 30px; }
p { font-size: 20px; }
}Semantic HTML and ARIA
Use HTML tags according to their semantic meaning: each tag and its attributes used for its intended purpose within the overall document structure. ARIA supplements HTML semantics and helps assistive technologies navigate the page.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<!-- Viewport meta ensures responsiveness. Accessible apps are responsive apps -->
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Accessibility in Technology: Frontend Practices</title>
</head>
<body>
<header>
<!-- aria-label describes the nav block's purpose to assistive technologies -->
<nav aria-label="Main navigation">
<ul>
<!-- Descriptive link text helps users understand link purpose -->
<li><a href="index.php">Home</a></li>
<li><a href="accessibility-gallery.php">Accessibility Gallery</a></li>
<li><a href="about.php">About Us</a></li>
<li><a href="contact.php">Contact Us</a></li>
</ul>
</nav>
</header>
<main>
<!-- h1 is the highest level heading, used once per page -->
<h1>Enhancing Accessibility in Technology</h1>
<p>Explore how technology can be designed to be accessible and inclusive for all users.</p>
<!-- aria-labelledby connects the section to its heading, building on document structure -->
<section aria-labelledby="accessibility-gallery-heading">
<h2 id="accessibility-gallery-heading">Accessibility Innovations Gallery</h2>
<!-- Alt text clearly describes the image's content and purpose -->
<img
src="imagePath/accessibility-tech.jpg"
alt="A demonstration of accessible technology featuring adaptive devices and software interfaces"
/>
</section>
<section aria-labelledby="latest-accessibility-heading">
<h2 id="latest-accessibility-heading">Latest in Accessibility</h2>
<article>
<h3>Accessible Design Principles</h3>
<p>A deep dive into the core principles that guide the development of accessible technology.</p>
<a href="https://www.w3.org/WAI/fundamentals/">Read the WAI accessibility fundamentals</a>
</article>
</section>
</main>
</body>
</html>When developing applications using modern frameworks like React, ARIA becomes particularly useful when creating reusable components that are agnostic to the overall document structure.
import React from 'react';
interface AccessibleButtonProps {
label: string;
onClick: () => void;
disabled?: boolean;
}
const AccessibleButton: React.FC<AccessibleButtonProps> = ({
label,
onClick,
disabled = false,
}) => {
return (
<button
aria-label={label}
aria-disabled={disabled ? 'true' : 'false'}
onClick={onClick}
style={{
backgroundColor: disabled ? '#ccc' : '#007BFF',
color: 'white',
fontSize: '16px',
borderRadius: '5px',
cursor: disabled ? 'not-allowed' : 'pointer',
outline: 'none',
}}
onKeyDown={(event: React.KeyboardEvent<HTMLButtonElement>) => {
// Enter and Space activate the button. Prevents page scroll on Space
if (!disabled && (event.key === 'Enter' || event.key === ' ')) {
onClick();
event.preventDefault();
}
}}
disabled={disabled}
tabIndex={disabled ? -1 : 0}
>
{label}
</button>
);
};
export default AccessibleButton;Integrating Accessibility Tools into Your Development Environment
Incorporating accessibility tools into your workflow keeps CARE front of mind throughout development, not just at the end.
Linting Tools
ESLint with accessibility plugins helps enforce coding standards and catch common accessibility issues early. eslint-plugin-jsx-a11y is a static accessibility evaluation plugin for React that checks for semantic HTML and appropriate ARIA attribute usage before your code ever runs.
Browser Extensions
- WCAG Color Contrast Checker: validates contrast ratios as you style
- WAVE Web Accessibility Evaluation Tools: visual feedback on accessibility issues
- Google Lighthouse: audits accessibility alongside performance and SEO
Browser extensions provide immediate feedback during development, making them ideal for quick iterative checks.
Accessibility and Testing
Ensuring accessibility requires both automated and manual testing strategies. Automated checks catch the common patterns; manual testing catches what automation misses.
When I backfilled accessibility testing across the Pluralsight Flow platform, we introduced axe-core into the CI pipeline and enforced it as a required check. That combination of automated detection in CI and targeted manual review is what brought all customer-facing routes to WCAG AA compliance. Neither approach alone would have gotten there.
Unit and Integration Testing
jest-axe integrates accessibility checks into Jest unit tests, allowing you to evaluate components for violations as part of your standard testing routine.
import React from 'react';
import { render } from '@testing-library/react';
import { axe, toHaveNoViolations } from 'jest-axe';
import MyComponent from './MyComponent';
expect.extend(toHaveNoViolations);
describe('MyComponent', () => {
it('should have no accessibility violations', async () => {
const { container } = render(<MyComponent />);
const results = await axe(container);
expect(results).toHaveNoViolations();
});
});cypress-axe integrates accessibility checks into Cypress integration tests, evaluating entire pages and interaction flows.
import 'cypress-axe';
describe('Checkout Process Accessibility', () => {
it('should pass accessibility checks through the checkout flow', () => {
cy.visit('/shop');
cy.injectAxe();
cy.checkA11y(); // Initial shop page
cy.findByText('Add to Cart').click();
cy.findByText('Cart').click();
cy.checkA11y(); // Cart page
cy.findByText('Checkout').click();
cy.wait(500);
cy.checkA11y(); // Checkout page
});
});Manual Testing
Automated tools catch roughly 30–40% of accessibility issues. Manual testing covers the rest. Use this checklist alongside automated checks:
Keyboard navigation: All interactive elements (links, buttons, form controls) should be reachable and operable using Tab, Enter, and Space.
Responsiveness: Applications should be both usable and display correctly across all device sizes.
Interaction: Interactive content should be intuitive and predictable. Focused elements should not change context or update the page unexpectedly. Users should have sufficient time to interact with content and receive clear error and confirmation feedback.
Conclusion
The CARE principle (Coding for Accessible and Responsive Experiences) should be integral to how frontend engineers work, not a phase at the end of a project. Incorporating accessibility from initial development through CI enforcement keeps it as a foundational practice rather than an afterthought. The goal is a product that works for everyone who uses it.