JudgeFinder/lighthouserc.js at main · thefiredev-cloud/JudgeFinder · GitHub

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/**
 * Lighthouse CI Configuration
 * Automated performance, accessibility, and SEO audits
 *
 * Run with: npm run lighthouse
 */

module.exports = {
  ci: {
    collect: {
      // Number of runs per URL (median is used)
      numberOfRuns: 3,

      // URLs to audit
      url: [
        'http://localhost:3000/',
        'http://localhost:3000/judges',
        'http://localhost:3000/courts',
        'http://localhost:3000/search',
      ],

      // Start local server before running audits
      startServerCommand: 'npm run build && npm start',
      startServerReadyPattern: 'Ready',
      startServerReadyTimeout: 120000,

      // Lighthouse settings
      settings: {
        preset: 'desktop',
        throttling: {
          rttMs: 40,
          throughputKbps: 10240,
          cpuSlowdownMultiplier: 1,
        },
        // Skip PWA audit (we're not a PWA yet)
        skipAudits: ['installable-manifest', 'splash-screen', 'themed-omnibox'],
      },
    },

    assert: {
      // Performance budgets
      assertions: {
        // Core Web Vitals
        'largest-contentful-paint': ['error', { maxNumericValue: 2500 }],
        'cumulative-layout-shift': ['error', { maxNumericValue: 0.1 }],
        'total-blocking-time': ['error', { maxNumericValue: 300 }],
        'first-contentful-paint': ['error', { maxNumericValue: 1800 }],
        'speed-index': ['error', { maxNumericValue: 3400 }],
        interactive: ['error', { maxNumericValue: 3800 }],

        // Performance Score
        'categories:performance': ['warn', { minScore: 0.9 }],

        // Accessibility (WCAG AA compliance)
        'categories:accessibility': ['error', { minScore: 0.95 }],

        // Best Practices
        'categories:best-practices': ['warn', { minScore: 0.9 }],

        // SEO
        'categories:seo': ['error', { minScore: 0.95 }],

        // Resource budgets
        'resource-summary:document:size': ['warn', { maxNumericValue: 50000 }],
        'resource-summary:script:size': ['warn', { maxNumericValue: 500000 }],
        'resource-summary:stylesheet:size': ['warn', { maxNumericValue: 100000 }],
        'resource-summary:image:size': ['warn', { maxNumericValue: 200000 }],
        'resource-summary:font:size': ['warn', { maxNumericValue: 150000 }],

        // Network requests
        'resource-summary:script:count': ['warn', { maxNumericValue: 30 }],
        'resource-summary:stylesheet:count': ['warn', { maxNumericValue: 10 }],
        'resource-summary:third-party:count': ['warn', { maxNumericValue: 10 }],

        // Specific audits
        'uses-text-compression': 'error',
        'uses-optimized-images': 'warn',
        'modern-image-formats': 'warn',
        'offscreen-images': 'warn',
        'unused-javascript': 'warn',
        'unused-css-rules': 'warn',
        'uses-rel-preconnect': 'warn',
        'uses-http2': 'error',

        // Security
        'is-on-https': 'error',
        'uses-http2': 'error',
      },
    },

    upload: {
      // Store reports locally
      target: 'filesystem',
      outputDir: './lighthouse-reports',
      reportFilenamePattern: '%%PATHNAME%%-%%DATETIME%%.report.%%EXTENSION%%',
    },
  },
}