web-vitals/dist/web-vitals.umd.cjs

Easily measure performance metrics in JavaScript

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t)n.interactionId&&(I=Math.min(I,n.interactionId),k=Math.max(k,n.interactionId),w=k?(k-I)/7+1:0)};let F;const N=()=>F?w:performance.interactionCount??0,B=()=>{"interactionCount"in performance||F||(F=m(["event"],C,{durationThreshold:0}))};class S{u=0;v=[];p=new Map;m;T;_(){return N()-this.u}M(){this.u=N(),this.v.length=0,this.p.clear()}L(t){const n=this._(),e=Math.min(this.v.length-1,Math.floor(n/50));return!n||-1!==e||"soft-navigation"!==t&&"back-forward-cache"!==t?this.v[e]:{P:8,id:-1,entries:[]}}h(t){if(this.m?.(t),!t.interactionId&&"first-input"!==t.entryType)return;const n=this.v.at(-1);let e=this.p.get(t.interactionId);if(e||this.v.length<10||t.duration>n.P){if(e?t.duration>e.P?(e.entries=[t],e.P=t.duration):t.duration===e.P&&t.startTime===e.entries[0].startTime&&e.entries.push(t):(e={id:t.interactionId,entries:[t],P:t.duration},this.p.set(e.id,e),this.v.push(e)),this.v.sort((t,n)=>n.P-t.P),this.v.length>10){const t=this.v.splice(10);for(const n of t)this.p.delete(n.id)}this.T?.(e)}}}const q=t=>{const n="requestIdleCallback"in globalThis?1e3:0,e=globalThis.requestIdleCallback||setTimeout,i=globalThis.cancelIdleCallback||clearTimeout;if("hidden"===document.visibilityState)t();else{const o=T(t);let s=-1;const a=()=>{i(s),o()};addEventListener("visibilitychange",a,{once:!0,capture:!0}),s=e(()=>{removeEventListener("visibilitychange",a,{capture:!0}),o()},{timeout:n})}},x=[200,500];class A{m;l;h(t){this.m?.(t)}}const H=[2500,4e3],O=[800,1800],U=t=>{document.prerendering?E(()=>U(t)):"complete"!==document.readyState?addEventListener("load",()=>U(t),!0):setTimeout(t)};t.CLSThresholds=P,t.FCPThresholds=M,t.INPThresholds=x,t.LCPThresholds=H,t.TTFBThresholds=O,t.onCLS=(t,n={})=>{const a=l();L(T(()=>{let r,c=u("CLS",0);const 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t){if(!n)continue;if("soft-navigation"===n.entryType){b(n);continue}let t=0,e=[],i=n.startTime;if("largest-contentful-paint"===n.entryType)t=Math.max(n.startTime-r(),0),g.h(n),e=[n];else if("interaction-contentful-paint"===n.entryType){const o=n;if(!h.navigationId)continue;if("interactionId"in o&&o.interactionId!=h.navigationInteractionId)continue;i=o.largestContentfulPaint?.renderTime||0,t=Math.max(i-n.startTime,0),o.largestContentfulPaint&&(g.h(o.largestContentfulPaint),e=[o.largestContentfulPaint])}i<d.firstHiddenTime&&(h.value=t,h.entries=e,f())}},_=["largest-contentful-paint"];c&&_.push("interaction-contentful-paint","soft-navigation");const E=m(_,T);if(E){f=o(t,h,H,n.reportAllChanges);const r=["keydown","click","visibilitychange"],d=t=>{if(t.isTrusted&&!a){const t=h.id;q(()=>{if(!a){if(!c){E.disconnect();for(const t of r)removeEventListener(t,d,{capture:!0})}t===h.id&&(a=!0,f(!0))}})}};for(const t of r)addEventListener(t,d,{capture:!0});i(i=>{p("back-forward-cache",h.navigationId,h.navigationInteractionId,h.navigationURL,e()),f=o(t,h,H,n.reportAllChanges),s(()=>{h.value=performance.now()-i.timeStamp,a=!0,f(!0)})})}})},t.onTTFB=(t,n={})=>{const s=b(n);let c=u("TTFB"),f=o(t,c,O,n.reportAllChanges);U(()=>{const d=a();if(d){const a=d.responseStart;if(c.value=Math.max(a-r(),0),c.entries=[d],f(!0),i(()=>{c=u("TTFB",0,"back-forward-cache",c.navigationId,c.navigationInteractionId,c.navigationURL,e()),f=o(t,c,O,n.reportAllChanges),f(!0)}),s){m(["soft-navigation"],e=>{e.forEach(e=>{e.navigationId&&(c=u("TTFB",0,"soft-navigation",e.navigationId,e.interactionId,e.name,e.startTime),c.entries=[e],f=o(t,c,O,n.reportAllChanges),f(!0))})},n)}}})}});
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