
Many developers today use different technologies (backend/CMS/JavaScript frameworks) to build their web pages. To this end, there are two features now available that allow you to tailor Lighthouse to your specific needs. Lighthouse aims to provide guidance that is relevant and actionable for all web developers.

Open the Viewer, and paste the URL of a Gist into it. To view a report that's been saved as a Gist:Īdd ?gist= to the Viewer's URL, where is the ID of the Gist.
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How to generate JSON output from the command line tool. See Share reports as JSON for an example of The Gist filename containing the JSON output must end in Just manually create a Gist and copy-paste the report's JSON output To export a report as a Gist from the CLI version of Lighthouse, GitHub data, and to read and write to your Gists. The report opens in theįirst time you do this, a popup asks permission to access your basic
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One benefit of Gists is free version control. If you don't want to manually pass around JSON files, you can also share your Open your file navigator and select the file.

List below explains how to get the JSON output, depending on what The Lighthouse Viewer needs the JSON output of a Lighthouse report. Use the Lighthouse Viewer to view and share reports online. Lighthouse runs its audits against theĬurrently-focused page, then opens up a new tab with a report of the After clicking, the LighthouseĬlick Generate report. If not, open Chrome's main menu andĪccess it at the top of the menu. In Chrome, go to the page you want to audit.īe next to the Chrome address bar. Sites and authenticated pages, while the extension does not.Ĭhrome Extension from the Chrome Webstore. The DevTools workflow allows for testing local Rather than this Chrome Extension workflow. Run Lighthouse as a Chrome Extension Note: Unless you have a specific reason, you should use the Chrome DevTools workflow See Using programmatically for an example of running Lighthouse The -g flag installs it as a global module.
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Install and run the Node command line tool

After 30 to 60 seconds, Lighthouse gives you a reportįigure 2. DevTools shows you a list of audit categories.Ĭlick Run audit. To the right is the Audits panel of Chrome DevTools, whichĬlick Perform an audit. To the left is the viewport of the page that will beĪudited. You can audit any URL on the web.įigure 1.
