| 1 | import type { LoadState, Metric } from './base.js';
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| 2 | /**
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| 3 | * An FID-specific version of the Metric object.
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| 4 | */
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| 5 | export interface FIDMetric extends Metric {
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| 6 | name: 'FID';
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| 7 | entries: PerformanceEventTiming[];
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| 8 | }
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| 9 | /**
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| 10 | * An object containing potentially-helpful debugging information that
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| 11 | * can be sent along with the FID value for the current page visit in order
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| 12 | * to help identify issues happening to real-users in the field.
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| 13 | */
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| 14 | export interface FIDAttribution {
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| 15 | /**
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| 16 | * A selector identifying the element that the user interacted with. This
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| 17 | * element will be the `target` of the `event` dispatched.
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| 18 | */
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| 19 | eventTarget: string;
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| 20 | /**
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| 21 | * The time when the user interacted. This time will match the `timeStamp`
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| 22 | * value of the `event` dispatched.
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| 23 | */
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| 24 | eventTime: number;
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| 25 | /**
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| 26 | * The `type` of the `event` dispatched from the user interaction.
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| 27 | */
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| 28 | eventType: string;
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| 29 | /**
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| 30 | * The `PerformanceEventTiming` entry corresponding to FID.
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| 31 | */
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| 32 | eventEntry: PerformanceEventTiming;
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| 33 | /**
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| 34 | * The loading state of the document at the time when the first interaction
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| 35 | * occurred (see `LoadState` for details). If the first interaction occurred
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| 36 | * while the document was loading and executing script (e.g. usually in the
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| 37 | * `dom-interactive` phase) it can result in long input delays.
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| 38 | */
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| 39 | loadState: LoadState;
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| 40 | }
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| 41 | /**
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| 42 | * An FID-specific version of the Metric object with attribution.
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| 43 | */
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| 44 | export interface FIDMetricWithAttribution extends FIDMetric {
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| 45 | attribution: FIDAttribution;
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| 46 | }
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