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web-vitals

Easily measure performance metrics in JavaScript

v4.2.4 URL: https://unpkg.com/web-vitals@4.2.4/dist/web-vitals.iife.js

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cruxperformancemetricsCore Web VitalsCLSFCPFIDINPLCPTTFB

main-thread-scheduling

Fast and consistently responsive apps using a single function call

v14.3.0 URL: https://unpkg.com/main-thread-scheduling@14.3.0/index.js

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postTaskuser-blockinguser-visiblebackgroundsmoothtaskidleyielddeferpostponethreadthreadsthreadingschedulingschedulerisInputPendingMessageChannelmain-threadevent loopworkerweb workerCore Web VitalsINPInteraction to Next Paintperformance

idlefy

Defer non-critical tasks to run when the main thread is idle

v1.1.1 URL: https://unpkg.com/idlefy@1.1.1/dist/min/index.mjs

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idledeferidle-until-urgetrequestIdleCallbackcancelIdleCallbackrequestIdleCallbackPolyfillINPPerformance

crux-api

A tiny CrUX API wrapper that supports record & history API, handles errors, and provides types.

v3.0.1 URL: https://unpkg.com/crux-api@3.0.1/src/index.js

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CrUXCrUX APICrUX History APIChrome User Experience ReportChrome UX ReportCore Web VitalsWeb PerformanceFCPFirst Contentful PaintLCPLargest Contentful PaintFIDFirst Input DelayCLSCumulative Layout ShiftINPInteration to Next PaintTTFBTime to First Byte

performance-event-timing-polyfill

Provide a polyfill for the PerformanceEventTiming interface

v0.5.4 URL: https://unpkg.com/performance-event-timing-polyfill@0.5.4/dist/performance-event-timing-polyfill.iife.js

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cruxperformancemetricstimingpolyfillPerformanceEventTimingPerformance Event Timing PolyfillCore Web VitalsINP