11 lines
600 B
TypeScript
11 lines
600 B
TypeScript
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import { FCPMetric, MetricRatingThresholds, ReportOpts } from './types.js';
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/** Thresholds for FCP. See https://web.dev/articles/fcp#what_is_a_good_fcp_score */
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export declare const FCPThresholds: MetricRatingThresholds;
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/**
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* Calculates the [FCP](https://web.dev/articles/fcp) value for the current page and
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* calls the `callback` function once the value is ready, along with the
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* relevant `paint` performance entry used to determine the value. The reported
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* value is a `DOMHighResTimeStamp`.
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*/
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export declare const onFCP: (onReport: (metric: FCPMetric) => void, opts?: ReportOpts) => void;
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