• Cap pending LoAFs to avoid memory leak (#796)

• Fix negative inputDelay in INP attribution (#789)

• Prevent spurious CLS report of 0 after bfcache restore (#786)
• Guard supportedEntryTypes for older browsers (#787)

• Scope the navigation interaction count to each InteractionManager (#783)

• Add Resource Timing buffer for LCP attribution (#776)

• Prevent JavaScript error if PerformanceObserver not available (#772)

v6 introduces Soft Navigation support for the Web Vitals metrics when supported by the browser.

• [BREAKING] Remove unneeded modules with tsconfig verbatimModuleSyntax (#741)
• Add source maps (#771)
• Cap RequestIdleCallback to 1 second to ensure metrics report even when busy (#755)
• Flip default for includeProcessedEventEntries to false for v6 (#763)
• Add Soft Navigation support (#308)
• Add bfcache support for reporting small INP interactions (part of #308)

• Remove getFirstHiddenTimePolyfill (#729)
• Fixed issue where the same configuration object to multiple metric functions can result in errors (#731)
• Add more robust interactionTarget setting for INP (#744)

• Replace filter()[0] with find() for better performance (#658)
• Use queueMicrotask for microtask scheduling (#660)
• Simplify the event and LoAF entry clean up logic (#662)
• Remove obsolete FID polyfill types (#675)
• Use LargestContentfulPaint.id as fallback when element is removed from DOM (#676)
• Fix bug for onLCP when attached late (#697)
• FHandle initially hidden pages and onLCP registered on visibility change (#698)
• Ensure we clear idle callbacks in whenIdleOrHidden (#707)
• Limit pending events to conserve memory (#710)
• Add includeProcessedEventEntries option (#714)
• Reduce bundle size by refactoring (#713)

• Register visibility-change early (#637)
• Only finalize LCP on user events (isTrusted=true) (#635)
• Fallback to default getSelector if custom function is null or undefined (#634)

• Remove visibilitychange event listeners when no longer required (#627)

• Handle layout shifts with no sources (#623)

• Fix missing FCP and LCP for prerendered pages (#621)

• [BREAKING] Remove the deprecated onFID() function (#519)
• [BREAKING] Change browser support policy to Baseline Widely available (#525)
• [BREAKING] Sort the classes that appear in attribution selectors to reduce cardinality (#518)
• Extend INP attribution with extra LoAF information: longest script and buckets (#592)
• Add support for generating custom targets in the attribution build (#585)
• Support multiple calls to onINP() with different config options (#583)
• Use visibility-state performance entries (#612)
• Ensure idle callbacks don't run twice (#541) and (#548)
• Cap nextPaintTime at processingStart (#540) and (#546)
• Cap INP breakdowns to INP duration (#528)
• Cap LCP load duration to LCP time (#527)

• Fix memory leak in registering new event listeners on every keydown and click (#554)

• Fix missing LoAF entries in INP attribution (#512)

• Fix interaction count after bfcache restore (#505)

• Fix compatibility issues with TypeScript v5.5 (#497)

• Refactor INP attribution code to fix errors on Windows 10 (#495)

• Fix pending LoAF cleanup logic (#493)

• Move the support check to the top of the onINP() function (#490)
• Fix missing LoAF attribution when entries are dispatched before event entries (#487)

• Add the ReportCallback type back but deprecate it (#483)

• [BREAKING] Update types to support more generic usage (#471)
• [BREAKING] Split waitingDuration to make it easier to understand redirect delays (#458)
• [BREAKING] Rename TTFBAttribution fields from *Time to *Duration (#453)
• [BREAKING] Rename resourceLoadTime to resourceLoadDuration in LCP attribution (#450)
• [BREAKING] Add INP breakdown timings and LoAF attribution (#442)
• [BREAKING] Deprecate onFID() and remove previously deprecated APIs (#435)
• Expose the target element in INP attribution (#479)
• Save INP target after interactions to reduce null values when removed from the DOM (#477)
• Cap TTFB in attribution (#440)
• Fix reportAllChanges behavior for LCP when library is loaded late (#468)

• Pick the first non-null target for INP attribution (#421)

• Add extra guard for PerformanceEventTiming not existing (#403)

• Run onLCP callback in separate task (#386)
• Fix INP durationThreshold bug when set to 0 (#372)
• Prevent FID entries being emitted as INP for non-supporting browsers (#368)

• Make bindReporter generic over metric type (#359)
• Update INP status in README (#362)
• Fix Metric types for better TypeScript support (#356)
• Fix selector for SVGs for attribution build (#354)

• Fix attribution types (#348)
• Safe access navigation entry type (#290)

• Export metric rating thresholds in attribution build as well.

• Export metric rating thresholds, add explicit MetricRatingThresholds type (#323)
• Trim classname selector (#328)
• Add link to CrUX versus RUM blog post (#327)
• Prevent LCP being reported for hidden prerendered pages (#326)
• Add Server Timing information to docs (#324)
• Fix link in onINP() thresholds comment (#318)
• Update web.dev link for onINP() (#307)
• Add a note about when to load the library (#305)

• Version number skipped

• Defer CLS logic until after onFCP() callback (#297)

• Add support for 'restore' as a navigationType (#284)
• Report initial CLS value when reportAllChanges is true (#283)
• Defer all observers until after activation (#282)
• Ignore TTFB for loads where responseStart is zero (#281)
• Defer execution of observer callbacks (#278)

• Clamp LCP and FCP to 0 for prerendered pages (#270)

• Ensure attribution object is always present in attribution build (#265)

• Set an explicit unpkg dist file (#261)

• Use the cjs extension for all UMD builds (#257)

• [BREAKING] Add a config object param to all metric functions (#225)
• [BREAKING] Report TTFB after a bfcache restore (#220)
• [BREAKING] Only include last LCP entry in metric entries (#218)
• Update the metric ID prefix for v3 (#251)
• Move the Navigation Timing API polyfill to the base+polyfill build (#248)
• Add a metric rating property (#246)
• Add deprecation notices for base+polyfill builds (#242)
• Add a new attribution build for debugging issues in the field (#237, #244)
• Add support for prerendered pages (#233)
• Rename the ReportHandler type to ReportCallback, with alias for back-compat (#225, #227)
• Add support for the new INP metric (#221, #232)
• Rename getXXX() functions to onXXX() (#222)
• Add a navigationType property to the Metric object (#219)

• Prevent TTFB from reporting after bfcache restore (#201)

• Only call report if LCP occurs before first hidden (#197)

• Ensure reported TTFB values are less than the current page time (#187)

• Add feature detects to support Opera mini in extreme data saver mode (#186)

• Add batch reporting support and guidance (#166)

• Detect getEntriesByName support before calling (#158)

• [BREAKING] Update CLS to max session window 5s cap 1s gap (#148)
• Ensure CLS is only reported if page was visible (#149)
• Only report CLS when FCP is reported (#154)
• Update the unique ID version prefix (#157)

• Ignore negative TTFB values in Firefox (#147)
• Add workaround for Safari FCP bug (#145)
• Add more extensive FID feature detect (#143)

• Remove use of legacy API to detect Firefox (#128)

• Fix incorrect UMD config for base+polyfill script (#117)
• Fix missing getter in polyfill (#114)
• Add support for Set in place of WeakSet for IE11 compat (#110)

• Fix missing typings declaration (#90)

• [BREAKING] Add support for reporting metrics on back/forward cache restore (#87)
• [BREAKING] Remove the isFinal flag from the Metric interface (#86)
• Remove the scroll listener to stop LCP observing (#85)

• Remove the unload listener (#68)

• Ensure reports only occur if a PO was created (#58)

• Remove package type field (#35)

• Ensure all modules are pure modules (#23)
• Ensure proper TypeScript exports and config (#22)

• Initial public release

• Initial pre-release