web-performance-monitor-sdk/dist/utils.d.ts

A modern, lightweight performance monitoring SDK for web applications. Monitor Core Web Vitals (LCP, FCP, FID, CLS, TTFB) with sendBeacon support.

/**
 * 性能指标工具函数
 */
import { PerformanceScore, MetricDetail } from './types';
/**
 * 根据性能指标值计算评分
 */
export declare function getPerformanceScore(metric: string, value: number): PerformanceScore;
/**
 * 创建性能指标详情
 */
export declare function createMetricDetail(value: number, metric: string): MetricDetail;
/**
 * 格式化性能数据用于输出
 */
export declare function formatMetrics(metrics: Record<string, MetricDetail>): Record<string, any>;
/**
 * 检查浏览器是否支持Performance Observer
 */
export declare function isPerformanceObserverSupported(): boolean;
/**
 * 检查浏览器是否支持sendBeacon
 */
export declare function isSendBeaconSupported(): boolean;
/**
 * 生成随机采样ID
 */
/**
 * 根据采样率决定是否采集数据。
 *
 * @param sampleRate 介于0和1之间的数，表示采样概率
 * @returns 是否采样（true为采样，false为跳过）
 */
export declare function shouldSample(sampleRate?: number): boolean;
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