web-vitals/dist/web-vitals.base.js

Easily measure performance metrics in JavaScript

var e,n=-1,t=function(e){addEventListener("pageshow",(function(t){t.persisted&&(n=t.timeStamp,e(t))}),!0)},i=function(){return window.performance&&(performance.getEntriesByType&&performance.getEntriesByType("navigation")[0]||function(){var e=performance.timing,n=performance.navigation.type,t={entryType:"navigation",startTime:0,type:2==n?"back_forward":1===n?"reload":"navigate"};for(var i in e)"navigationStart"!==i&&"toJSON"!==i&&(t[i]=Math.max(e[i]-e.navigationStart,0));return t}())},r=function(){var e=i();return e&&e.activationStart||0},a=function(e,t){var a=i(),o="navigate";return n>=0?o="back-forward-cache":a&&(o=document.prerendering||r()>0?"prerender":a.type.replace(/_/g,"-")),{name:e,value:void 0===t?-1:t,rating:"good",delta:0,entries:[],id:"v3-".concat(Date.now(),"-").concat(Math.floor(8999999999999*Math.random())+1e12),navigationType:o}},o=function(e,n,t){try{if(PerformanceObserver.supportedEntryTypes.includes(e)){var i=new PerformanceObserver((function(e){n(e.getEntries())}));return i.observe(Object.assign({type:e,buffered:!0},t||{})),i}}catch(e){}},u=function(e,n){var t=function t(i){"pagehide"!==i.type&&"hidden"!==document.visibilityState||(e(i),n&&(removeEventListener("visibilitychange",t,!0),removeEventListener("pagehide",t,!0)))};addEventListener("visibilitychange",t,!0),addEventListener("pagehide",t,!0)},c=function(e,n,t,i){var r,a;return function(o){n.value>=0&&(o||i)&&((a=n.value-(r||0))||void 0===r)&&(r=n.value,n.delta=a,n.rating=function(e,n){return e>n[1]?"poor":e>n[0]?"needs-improvement":"good"}(n.value,t),e(n))}},s=-1,f=function(){u((function(e){var n=e.timeStamp;s=n}),!0)},l=function(){return s<0&&((s=window.webVitals.firstHiddenTime)===1/0&&f(),t((function(){setTimeout((function(){s="hidden"!==document.visibilityState||document.prerendering?1/0:0,f()}),0)}))),{get firstHiddenTime(){return s}}},d=function(e,n){n=n||{};var i,u=[1800,3e3],s=l(),f=a("FCP"),d=function(e){e.forEach((function(e){"first-contentful-paint"===e.name&&(v&&v.disconnect(),e.startTime<s.firstHiddenTime&&(f.value=e.startTime-r(),f.entries.push(e),i(!0)))}))},p=window.performance&&window.performance.getEntriesByName&&window.performance.getEntriesByName("first-contentful-paint")[0],v=p?null:o("paint",d);(p||v)&&(i=c(e,f,u,n.reportAllChanges),p&&d([p]),t((function(t){f=a("FCP"),i=c(e,f,u,n.reportAllChanges),requestAnimationFrame((function(){requestAnimationFrame((function(){f.value=performance.now()-t.timeStamp,i(!0)}))}))})))},p=!1,v=-1,m=function(e,n){n=n||{};var i=[.1,.25];p||(d((function(e){v=e.value})),p=!0);var r,s=function(n){v>-1&&e(n)},f=a("CLS",0),l=0,m=[],h=function(e){e.forEach((function(e){if(!e.hadRecentInput){var n=m[0],t=m[m.length-1];l&&e.startTime-t.startTime<1e3&&e.startTime-n.startTime<5e3?(l+=e.value,m.push(e)):(l=e.value,m=[e]),l>f.value&&(f.value=l,f.entries=m,r())}}))},g=o("layout-shift",h);g&&(r=c(s,f,i,n.reportAllChanges),u((function(){h(g.takeRecords()),r(!0)})),t((function(){l=0,v=-1,f=a("CLS",0),r=c(s,f,i,n.reportAllChanges)})))},h=function(e,n){n=n||{};var i,r=[100,300],s=l(),f=a("FID"),d=function(e){e.startTime<s.firstHiddenTime&&(f.value=e.processingStart-e.startTime,f.entries.push(e),i(!0))},p=function(e){e.forEach(d)},v=o("first-input",p);i=c(e,f,r,n.reportAllChanges),v&&u((function(){p(v.takeRecords()),v.disconnect()}),!0),console.warn('The web-vitals "base+polyfill" build is deprecated. See: https://bit.ly/3aqzsGm'),v||window.webVitals.firstInputPolyfill(d),t((function(){f=a("FID"),i=c(e,f,r,n.reportAllChanges),window.webVitals.resetFirstInputPolyfill(),window.webVitals.firstInputPolyfill(d)}))},g=0,y=1/0,T=0,w=function(e){e.forEach((function(e){e.interactionId&&(y=Math.min(y,e.interactionId),T=Math.max(T,e.interactionId),g=T?(T-y)/7+1:0)}))},C=function(){return e?g:performance.interactionCount||0},b=function(){"interactionCount"in performance||e||(e=o("event",w,{type:"event",buffered:!0,durationThreshold:0}))},E=0,S=function(){return C()-E},A=[],I={},F=function(e){var n=A[A.length-1],t=I[e.interactionId];if(t||A.length<10||e.duration>n.latency){if(t)t.entries.push(e),t.latency=Math.max(t.latency,e.duration);else{var i={id:e.interactionId,latency:e.duration,entries:[e]};I[i.id]=i,A.push(i)}A.sort((function(e,n){return n.latency-e.latency})),A.splice(10).forEach((function(e){delete I[e.id]}))}},L=function(e,n){n=n||{};var i=[200,500];b();var r,s=a("INP"),f=function(e){e.forEach((function(e){(e.interactionId&&F(e),"first-input"===e.entryType)&&(!A.some((function(n){return n.entries.some((function(n){return e.duration===n.duration&&e.startTime===n.startTime}))}))&&F(e))}));var n,t=(n=Math.min(A.length-1,Math.floor(S()/50)),A[n]);t&&t.latency!==s.value&&(s.value=t.latency,s.entries=t.entries,r())},l=o("event",f,{durationThreshold:n.durationThreshold||40});r=c(e,s,i,n.reportAllChanges),l&&(l.observe({type:"first-input",buffered:!0}),u((function(){f(l.takeRecords()),s.value<0&&S()>0&&(s.value=0,s.entries=[]),r(!0)})),t((function(){A=[],E=C(),s=a("INP"),r=c(e,s,i,n.reportAllChanges)})))},P={},M=function(e,n){n=n||{};var i,s=[2500,4e3],f=l(),d=a("LCP"),p=function(e){var n=e[e.length-1];if(n){var t=n.startTime-r();t<f.firstHiddenTime&&(d.value=t,d.entries=[n],i())}},v=o("largest-contentful-paint",p);if(v){i=c(e,d,s,n.reportAllChanges);var m=function(){P[d.id]||(p(v.takeRecords()),v.disconnect(),P[d.id]=!0,i(!0))};["keydown","click"].forEach((function(e){addEventListener(e,m,{once:!0,capture:!0})})),u(m,!0),t((function(t){d=a("LCP"),i=c(e,d,s,n.reportAllChanges),requestAnimationFrame((function(){requestAnimationFrame((function(){d.value=performance.now()-t.timeStamp,P[d.id]=!0,i(!0)}))}))}))}},k=function e(n){document.prerendering?addEventListener("prerenderingchange",(function(){return e(n)}),!0):"complete"!==document.readyState?addEventListener("load",(function(){return e(n)}),!0):setTimeout(n,0)},B=function(e,n){n=n||{};var o=[800,1800],u=a("TTFB"),s=c(e,u,o,n.reportAllChanges);k((function(){var f=i();if(f){if(u.value=Math.max(f.responseStart-r(),0),u.value<0||u.value>performance.now())return;u.entries=[f],s(!0),t((function(){u=a("TTFB",0),(s=c(e,u,o,n.reportAllChanges))(!0)}))}}))};export{m as getCLS,d as getFCP,h as getFID,L as getINP,M as getLCP,B as getTTFB,m as onCLS,d as onFCP,h as onFID,L as onINP,M as onLCP,B as onTTFB};