Lighthouse [tool] v1.0.0

Google Lighthouse is an automated auditing tool for web pages that measures performance, accessibility, best practices, SEO, and PWA metrics. The accessibility category runs axe-core plus additional checks and returns a 0–100 score with per-audit details.

signature: (url: URL, options?: LighthouseOptions) -> LighthouseReport

External

true

Package

lighthouse@^12

Output Type

• Categories:
  • Performance:
    • Score: 0..1
    • Audits: AuditResult[]
  • Accessibility:
    • Score: 0..1
    • Audits: AuditResult[]
  • Best Practices:
    • Score: 0..1
    • Audits: AuditResult[]
  • Seo:
    • Score: 0..1
    • Audits: AuditResult[]
• Lhr: LighthouseResultJson

Usage

    import { launch } from 'chrome-launcher';
    import lighthouse from 'lighthouse';

    const chrome = await launch({ chromeFlags: ['--headless'] });
    const result = await lighthouse(url, {
      port: chrome.port,
      onlyCategories: ['accessibility', 'best-practices'],
      output: 'json',
    });

    const a11yScore = result.lhr.categories.accessibility.score * 100;
    const failedAudits = result.lhr.categories.accessibility.auditRefs
      .filter(r => result.lhr.audits[r.id].score === 0)
      .map(r => result.lhr.audits[r.id].title);

    await chrome.kill();
  

Lighthouse [tool] v1.0.0

Google Lighthouse is an automated auditing tool for web pages that measures performance, accessibility, best practices, SEO, and PWA metrics. The accessibility category runs axe-core plus additional checks and returns a 0–100 score with per-audit details.

signature: (url: URL, options?: LighthouseOptions) -> LighthouseReport

External

true

Package

lighthouse@^12

Output Type

• Categories:
  • Performance:
    • Score: 0..1
    • Audits: AuditResult[]
  • Accessibility:
    • Score: 0..1
    • Audits: AuditResult[]
  • Best Practices:
    • Score: 0..1
    • Audits: AuditResult[]
  • Seo:
    • Score: 0..1
    • Audits: AuditResult[]
• Lhr: LighthouseResultJson

Usage

    import { launch } from 'chrome-launcher';
    import lighthouse from 'lighthouse';

    const chrome = await launch({ chromeFlags: ['--headless'] });
    const result = await lighthouse(url, {
      port: chrome.port,
      onlyCategories: ['accessibility', 'best-practices'],
      output: 'json',
    });

    const a11yScore = result.lhr.categories.accessibility.score * 100;
    const failedAudits = result.lhr.categories.accessibility.auditRefs
      .filter(r => result.lhr.audits[r.id].score === 0)
      .map(r => result.lhr.audits[r.id].title);

    await chrome.kill();
  

External

true

Package

lighthouse@^12

Output Type

• Categories:
  • Performance:
    • Score: 0..1
    • Audits: AuditResult[]
  • Accessibility:
    • Score: 0..1
    • Audits: AuditResult[]
  • Best Practices:
    • Score: 0..1
    • Audits: AuditResult[]
  • Seo:
    • Score: 0..1
    • Audits: AuditResult[]
• Lhr: LighthouseResultJson

Usage

    import { launch } from 'chrome-launcher';
    import lighthouse from 'lighthouse';

    const chrome = await launch({ chromeFlags: ['--headless'] });
    const result = await lighthouse(url, {
      port: chrome.port,
      onlyCategories: ['accessibility', 'best-practices'],
      output: 'json',
    });

    const a11yScore = result.lhr.categories.accessibility.score * 100;
    const failedAudits = result.lhr.categories.accessibility.auditRefs
      .filter(r => result.lhr.audits[r.id].score === 0)
      .map(r => result.lhr.audits[r.id].title);

    await chrome.kill();