Marc Mintel
5397309103
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47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
import type { LoadState, Metric } from './base';
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/**
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* An FCP-specific version of the Metric object.
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*/
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export interface FCPMetric extends Metric {
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name: 'FCP';
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entries: PerformancePaintTiming[];
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}
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/**
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* An object containing potentially-helpful debugging information that
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* can be sent along with the FCP value for the current page visit in order
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* to help identify issues happening to real-users in the field.
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*/
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export interface FCPAttribution {
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/**
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* The time from when the user initiates loading the page until when the
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* browser receives the first byte of the response (a.k.a. TTFB).
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*/
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timeToFirstByte: number;
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/**
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* The delta between TTFB and the first contentful paint (FCP).
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*/
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firstByteToFCP: number;
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/**
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* The loading state of the document at the time when FCP `occurred (see
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* `LoadState` for details). Ideally, documents can paint before they finish
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* loading (e.g. the `loading` or `dom-interactive` phases).
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*/
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loadState: LoadState;
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/**
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* The `PerformancePaintTiming` entry corresponding to FCP.
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*/
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fcpEntry?: PerformancePaintTiming;
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/**
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* The `navigation` entry of the current page, which is useful for diagnosing
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* general page load issues. This can be used to access `serverTiming` for example:
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* navigationEntry?.serverTiming
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*/
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navigationEntry?: PerformanceNavigationTiming;
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}
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/**
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* An FCP-specific version of the Metric object with attribution.
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*/
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export interface FCPMetricWithAttribution extends FCPMetric {
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attribution: FCPAttribution;
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}
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//# sourceMappingURL=fcp.d.ts.map |