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@brendankenny brendankenny released this May 8, 2019 · 18 commits to master since this release

5.0.0 (2019-05-07)

Full Changelog

Major new features

  • Stack packs are a new way to present stack-specific advice within the Lighthouse report. This initial version detects if a site is running on WordPress and adds additional information to the report on how to take advantage of Wordpress plugins and configuration to improve performance (#7243, #8169, #8633, #8536, #8778).

picture of Wordpress stack pack advice in the Lighthouse HTML report

  • Performance budgets are a new feature of Lighthouse to help prevent your site performance from regressing over time. Set budgets for the resources a page should load and have Lighthouse alert if the budgets aren't met (#8539, #8522, #8727, #8709, #8427, #8708).

picture of a Lighthouse performance budget in the HTML report

  • Lighthouse plugins are a new way to add custom checks to a Lighthouse run. They are presented in the Lighthouse report alongside (or instead of) the standard results, and can leverage tools and results within Lighthouse to get their job done. See the docs for examples (#8728).

picture of Lighthouse plugin results in the HTML report

New Audits

  • apple-touch-icon PWA audit (#8857)
  • performance-budget (#8539)
  • resource-summary (#8522)
  • max-potential-fid (previously in the JSON output, new in the HTML report) (#8729, #8817)

Breaking changes

  • Node 10 (LTS) or later is now required (#8117)
  • rawValue has been removed from audit results. If the audit had a meaningful numeric result (like a metric), this result will now be on numericValue (#8343, #8385, #8421)
  • The accessibility category scoring has been reweighted based on severity (#8823)
  • FCP accuracy has improved (in 'simulation' throttling) and may noticeably affect scores (#7513)
  • The deprecated --disable-device-emulation flag has been removed. Use --emulated-form-factor (#8289, #8334)
  • The dom-size now ignores elements in <head> and limits scoring to only DOM nodes in the body (#7241)
  • The diagnostics audit details have had their type value changed to debugdata (#8298)
  • The format of the screenshot-thumbnails screenshots has changed. They are now a full image data URL (#8299)

New contributors!

Thanks to @arnabsen, @housseindjirdeh, @MarkelFe, @muuvmuuv, and @Meggin for their first contributions!

Core

  • a11y: disable unused axe rules (#8373)
  • artifacts: create a PublicGathererArtifacts type (#8382)
  • runner: only pass requiredArtifacts to audits (#8760)
  • crc: redirects leading to iframe shouldn't be marked as critical (#6704)
  • driver: enable async stacks (#5504)
  • font-display: do not use invalid sourceURLs (#8535)
  • jsonld: structured data validation updates (#8137)
  • rect-helpers: make getBoundingRect take an array of rects (#8789)
  • seo: support spanish in link-text audit (#7547)
  • filter blob urls from more audits (#8724)
  • reword insecure error message (#8530)
  • seo: add image-alt to SEO category (#8407)
  • add devtoolsNodePath property to ScriptElements artifact (#8133)
  • always run axe gatherer last (#8216)

Report

Clients

  • devtools: remove ascii-encoded asset requirement (#8456, #8637)
  • lr: increase Page.getAppManifest timeout to 10s (#8350)
  • lr: apply, revert Lightrider timings to NetworkRequests (#8109, #8752)
  • psi: pass score scale element to psi (#8827)
  • lr: build report-generator-bundle (#8197)

Docs

  • update throttling (#8854)
  • readme: add mention of free tier of Foo integration (#8160)
  • readme: remove link to archived lighthouse-security project (#8141)

CLI

  • always handle chrome connection errors (#8583)
  • document that CSV is output to file (#8520)

Deps

  • chrome-launcher@0.10.7 (#8781)
  • axe-core@3.2.2 (#8370)

Tests

  • lightwallet: add perf-budget smoke test (#8853)
  • lightwallet: add budget to sample artifacts config (#8783, #8870)
  • add tap targets to dobetterweb sample page (#8803)
  • make update:sample-artifacts work for a single artifact type (#8802)
  • smokehouse: capture microtask regression (#8379)
  • smokehouse: support artifacts assertions in smoke tests (#8044)
  • smokehouse: fix tests from sharing artifacts (#8897)
  • smokehouse: change metric assertions from score to numericValue (#8805)
  • fix sample_v2 generation, proto errors (#8605)

I18n

  • import tamil translated strings (#8886)
  • SEO group titles and descriptions (#8719)
  • stack pack translations (#8154, #8415)
  • update seo group titles and descriptions (#8378)

Misc

  • proto: require protobuf 3.7.1, add stricter audit details test (#8863, #8867)
  • proto: remove trailing whitespace; add contributing help (#8818)
  • fix roundtrip sample_v2.json (#8815)
  • rename release scripts properly (#8751)
  • simplify LH.Config settings types (#8630)
  • add correct listitem.js @fileoverview (#8586)
  • update sample_v2 artifacts (#8243)
  • ci: build report and deploy to now.sh on every commit (#8194)
  • fix bad auto-merge (#8201)
  • update collected i18n string (#8158)
  • --help: remove screenshots mention from --save-assets (#8263)
  • lightwallet: update budget link (#8871)
  • fix common typos (#8726)
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