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21 lines
1.0 KiB
21 lines
1.0 KiB
2 months ago
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import { FirstInputPolyfillEntry, NavigationTimingPolyfillEntry } from '../types.js';
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interface PerformanceEntryMap {
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'event': PerformanceEventTiming[];
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'paint': PerformancePaintTiming[];
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'layout-shift': LayoutShift[];
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'largest-contentful-paint': LargestContentfulPaint[];
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'first-input': PerformanceEventTiming[] | FirstInputPolyfillEntry[];
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'navigation': PerformanceNavigationTiming[] | NavigationTimingPolyfillEntry[];
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'resource': PerformanceResourceTiming[];
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}
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/**
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* Takes a performance entry type and a callback function, and creates a
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* `PerformanceObserver` instance that will observe the specified entry type
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* with buffering enabled and call the callback _for each entry_.
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*
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* This function also feature-detects entry support and wraps the logic in a
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* try/catch to avoid errors in unsupporting browsers.
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*/
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export declare const observe: <K extends keyof PerformanceEntryMap>(type: K, callback: (entries: PerformanceEntryMap[K]) => void, opts?: PerformanceObserverInit) => PerformanceObserver | undefined;
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export {};
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