Monorepo Accessibility: Enforcing WCAG Across Nx, Turborepo & Shared UI Packages

Enterprise development teams managing multiple client-facing applications increasingly rely on Monorepo architectures (Nx, Turborepo, Lerna, or pnpm workspaces). Monorepos present an unprecedented opportunity: by establishing centralized accessibility rules and shared UI testing packages, you enforce uniform WCAG 2.2 Level AA compliance across all company products simultaneously.

The Strategic Advantages of Monorepo Accessibility

Instead of maintaining separate accessibility testing scripts in 50 disconnected repositories, a monorepo allows you to:

• Define global accessibility lint rules once in the root workspace.
• Share accessible UI primitive components (`@acme/ui`) across all web applications.
• Run automated accessibility regression tests only on applications affected by specific code changes.

Centralizing ESLint Configurations

Configure a shared base ESLint package (`@acme/eslint-config-a11y`) in your monorepo root:

// packages/eslint-config-a11y/index.js
module.exports = {
  plugins: ['jsx-a11y'],
  extends: ['plugin:jsx-a11y/recommended'],
  rules: {
    'jsx-a11y/alt-text': 'error',
    'jsx-a11y/anchor-is-valid': 'error',
    'jsx-a11y/no-autofocus': 'warn',
    'jsx-a11y/no-static-element-interactions': 'error',
    'jsx-a11y/click-events-have-key-events': 'error'
  }
};

Optimizing CI/CD with Affected Scans

Use Turborepo or Nx affected commands (`npx turbo run test:a11y --filter=...[origin/main]`) to test only the specific web applications and UI packages modified in each pull request, keeping CI build times under 3 minutes.