Google has launched Lighthouse 13 with a broad audit consolidation that aligns Lighthouse stories with Chrome DevTools’ newer perception mannequin.
The replace is offered now through npm and Chrome Canary. It’ll roll into PageSpeed Insights inside a couple of week and is slated for Chrome’s steady channel with model 143.
Google says the replace doesn’t change how Lighthouse calculates efficiency scores. This replace targets non-scored audits solely.
Lighthouse 13 Particulars
Audit Consolidation
Lighthouse 13 replaces many legacy audits with “insights” that mirror DevTools.
Notable examples embody:
- CLS And Format: layout-shifts turns into cls-culprits-insight for clearer identification of format shift causes.
- Server And Community: document-latency-insight consolidates redirects, server response time, and textual content compression checks.
- Photographs: image-delivery-insight replaces fashionable codecs, optimized pictures, responsive pictures, and environment friendly animated content material audits.
- LCP: Two insights break down Largest Contentful Paint points: lcp-discovery-insight and lcp-phases-insight. For interplay work, see interaction-to-next-paint-insight (INP).
- Third-Social gathering: third-parties-insight replaces the older third-party abstract to indicate exterior script impression.
Further replacements deal with DOM measurement, duplicated JavaScript, font show, legacy JavaScript, HTTP/2 and fashionable HTTPS, community dependency bushes, render-blocking, caching, and viewport configuration.
Audits Eliminated With out Replacements
A number of audits had been eliminated as a result of they’re outdated, inactionable, or low worth in fashionable environments. Moreover, some audits had been eliminated as a result of they had been expensive to run.
Eliminated audits embody:
- first-meaningful-paint
- font-size
- offscreen-images
- preload-fonts
- uses-rel-preload
- no-document-write
- uses-passive-event-listeners
- third-party-facades
Minor Variations From Earlier Previews
Google saved non-composited-animations and unsized-images as separate diagnostics to assist find points that don’t instantly trigger CLS.
Google additionally eliminated font-size and preload-fonts although these weren’t within the preliminary elimination record.
Why This Issues
In the event you depend on Lighthouse for shopper reporting, you will note fewer line gadgets and extra consolidated insights that map to DevTools.
Your scores shouldn’t change simply by upgrading, however any automation that keys off audit IDs might want to monitor the brand new perception identifiers.
For web optimization context, the elimination of the font-size audit displays Google’s place that this isn’t a present web optimization sign, although legibility stays a UX consideration.
Wanting Forward
Anticipate Lighthouse and DevTools to remain aligned on the identical perception mannequin.
For reporting, take into account mapping outdated audit IDs to the brand new insights now to keep away from damaged dashboards when PSI updates.
Featured Picture: FotoField/Shutterstock
