Frontend Accessibility Standards

WCAG accessibility standards require semantic HTML, proper ARIA attributes, keyboard navigation, adequate color contrast, and descriptive alt text for images. Apply these standards during UI development to ensure all interactive elements, forms, and content are usable by people with disabilities and assistive technologies like screen readers.

Keyboard accessibility in React, Vue, and Svelte components requires proper focus management, semantic HTML elements, ARIA labels, and keyboard event handlers. Ensure all interactive elements are reachable via Tab key, modals trap focus correctly, and buttons/inputs respond to Enter and Space keys.

Semantic HTML uses native elements like `<button>`, `<nav>`, `<form>`, and `<heading>` tags instead of generic divs, conveying structure and meaning to screen readers. Combine semantic markup with ARIA attributes like `aria-label` and `aria-describedby` to add context assistive technologies need.

Color contrast and alt text are core WCAG requirements checked during accessibility testing. Ensure text meets 4.5:1 contrast ratio for readability, all images have descriptive alt text, form inputs have associated labels, and heading hierarchies flow logically for navigation.

Accessible forms require proper labeling of inputs, descriptive error messages, keyboard operability, and clear visual focus indicators. These practices ensure users with disabilities, including those using keyboard-only navigation or screen readers, can complete and submit forms reliably.

Semantic HTML provides baseline accessibility, but ARIA attributes fill gaps where native elements lack sufficient meaning. Use ARIA for complex widgets like modals, tabs, and custom components; avoid redundant ARIA on standard elements like buttons and links.