.lighthouserc.js

const desktopSettings = {
  formFactor: 'desktop',
  // Copied from https://github.com/GoogleChrome/lighthouse/blob/dd8feb782652a962451aab6ac255c36e897c5afd/core/config/constants.js#L69
  screenEmulation: {
    mobile: false,
    width: 1350,
    height: 940,
    deviceScaleFactor: 1,
    disabled: false,
  },
  // Copied from https://github.com/GoogleChrome/lighthouse/blob/dd8feb782652a962451aab6ac255c36e897c5afd/core/config/constants.js#L84
  emulatedUserAgent:
    'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36',
  // Copied from https://github.com/GoogleChrome/lighthouse/blob/dd8feb782652a962451aab6ac255c36e897c5afd/core/config/constants.js#L42-L49
  throttling: {
    rttMs: 40,
    throughputKbps: 10 * 1024,
    cpuSlowdownMultiplier: 1,
    requestLatencyMs: 0, // 0 means unset
    downloadThroughputKbps: 0,
    uploadThroughputKbps: 0,
  },
};

module.exports = {
  ci: {
    collect: {
      numberOfRuns: 5,
      puppeteerScript: './scripts/puppeteer-script.js',
      settings: {
        onlyCategories: ['performance'],
        ...(process.env['LIGHTHOUSE_DESKTOP'] ? desktopSettings : {}),
      },
    },
  },
};