Designing Accessible Web Interfaces: WCAG 2.1 AA Checklist

Designing accessible software is both an ethical responsibility and a strategic business advantage that broadens target audience reach and improves search visibility.

**TL;DR:** Achieve WCAG 2.1 AA compliance by using semantic HTML5 elements, establishing 4.5:1 color contrast ratios, providing keyboard navigation, and adding ARIA attributes.

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Accessible Modal Dialog Pattern

// Accessible Radix Dialog Component
import * as Dialog from "@radix-ui/react-dialog";

export function AccessibleModal({ open, onOpenChange, title, children }: any) {
  return (
    <Dialog.Root open={open} onOpenChange={onOpenChange}>
      <Dialog.Portal>
        <Dialog.Overlay className="fixed inset-0 bg-black/50" />
        <Dialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-white p-6 rounded-lg shadow-xl">
          <Dialog.Title className="text-xl font-bold">{title}</Dialog.Title>
          <Dialog.Description className="text-sm text-gray-500 mt-1">
            Fill out the form below. Press ESC to exit.
          </Dialog.Description>
          {children}
        </Dialog.Content>
      </Dialog.Portal>
    </Dialog.Root>
  );
}