lighthouse

Analyzes web applications and web pages, collecting modern performance metrics and insights on developer best practices. More information: https://github.com/GoogleChrome/lighthouse.

• Generate an HTML report for a specific website and save it to a file in the current directory:
  lighthouse {{https://example.com}}
• Generate a JSON report and print it:
  lighthouse --output {{json}} {{https://example.com}}
• Generate a JSON report and save it to a specific file:
  lighthouse --output {{json}} --output-path {{path/to/file.json}} {{https://example.com}}
• Generate a report using the browser in headless mode without logging to stdout:
  lighthouse --quiet --chrome-flags="{{--headless}}" {{https://example.com}}
• Generate a report, using the HTTP header key/value pairs in the specified JSON file for all requests:
  lighthouse --extra-headers={{path/to/file.json}} {{https://example.com}}
• Generate a report for specific categories only:
  lighthouse --only-categories={{performance,accessibility,best-practices,seo,pwa}} {{https://example.com}}
• Generate a report with device emulation and all throttling disabled:
  lighthouse --screenEmulation.disabled --throttling-method={{provided}} --no-emulatedUserAgent {{https://example.com}}
• Display help:
  lighthouse --help