Lighthouse: Automated web performance auditing tool

const lighthouse = require('lighthouse');
const chromeLauncher = require('chrome-launcher');

async function runLighthouseAudit() {
  // Launch Chrome instance
  const chrome = await chromeLauncher.launch({chromeFlags: ['--headless']});
  
  const options = {
    logLevel: 'info',
    output: 'html',
    onlyCategories: ['performance'],
    port: chrome.port,
  };
  
  // Run Lighthouse audit
  const runnerResult = await lighthouse('https://example.com', options);
  
  // Extract scores and metrics
  const reportHtml = runnerResult.report;
  const score = runnerResult.lhr.categories.performance.score * 100;
  
  console.log(`Performance score: ${score}`);
  console.log(`First Contentful Paint: ${runnerResult.lhr.audits['first-contentful-paint'].displayValue}`);
  
  await chrome.kill();
  return runnerResult;
}

runLighthouseAudit().catch(console.error);