【大前端】实现一个前端埋点SDK，并封装成NPM包

🚀来做一个支持 React 的前端埋点 SDK，并把它封装成 npm 包 的形式。整体分 3 部分：

核心 SDK（独立的采集 & 上报逻辑）
React Hook / HOC 支持（自动埋点：路由变化、组件渲染、点击事件）
npm 包结构（package.json、打包配置）

1. SDK 核心逻辑（`src/core.ts`）

// src/core.ts (修改后)
export interface AnalyticsOptions {serverUrl: string;appId: string;userId?: string;maxQueueSize?: number;interval?: number;enableErrorTracking?: boolean; // 是否启用错误监控
}export class AnalyticsSDK {private serverUrl: string;private appId: string;private userId: string;private queue: EventData[] = [];private maxQueueSize: number;private interval: number;constructor(options: AnalyticsOptions) {this.serverUrl = options.serverUrl;this.appId = options.appId;this.userId = options.userId || this.getUserId();this.maxQueueSize = options.maxQueueSize || 10;this.interval = options.interval || 5000;this.startFlushTimer();window.addEventListener("beforeunload", () => this.flush(true));// 开启错误监控if (options.enableErrorTracking) {this.setupErrorTracking();}}private getUserId(): string {let uid = localStorage.getItem("analytics_uid");if (!uid) {uid = "uid_" + Math.random().toString(36).substring(2, 9);localStorage.setItem("analytics_uid", uid);}return uid;}public track(eventName: string, properties: Record<string, any> = {}) {const event: EventData = {eventName,properties,appId: this.appId,userId: this.userId,timestamp: Date.now(),url: window.location.href,ua: navigator.userAgent,};this.queue.push(event);if (this.queue.length >= this.maxQueueSize) {this.flush();}}private flush(sync = false) {if (this.queue.length === 0) return;const events = this.queue.splice(0, this.queue.length);if (sync && navigator.sendBeacon) {navigator.sendBeacon(this.serverUrl, JSON.stringify(events));} else {fetch(this.serverUrl, {method: "POST",headers: { "Content-Type": "application/json" },body: JSON.stringify(events),}).catch(() => {this.queue.unshift(...events);});}}private startFlushTimer() {setInterval(() => this.flush(), this.interval);}/** 绑定全局错误监控 */private setupErrorTracking() {// JS运行时错误 & 资源加载错误window.onerror = (message, source, lineno, colno, error) => {this.track("error_event", {type: "js_error",message,source,lineno,colno,stack: error?.stack || "",});};// Promise 未处理异常window.addEventListener("unhandledrejection", (event) => {this.track("error_event", {type: "unhandled_promise",reason: event.reason ? event.reason.toString() : "",});});}
}

2. React Hook 支持（`src/react.tsx`）

这里做几个封装：

usePageView：监听页面切换（适配 React Router）
useTrackClick：点击埋点 Hook
withTrackClick：HOC 包裹组件

// src/react.tsx
import { useEffect } from "react";
import { useLocation } from "react-router-dom";
import { AnalyticsSDK } from "./core";let sdk: AnalyticsSDK | null = null;export const initAnalytics = (instance: AnalyticsSDK) => {sdk = instance;
};// Hook: 页面访问埋点
export const usePageView = () => {const location = useLocation();useEffect(() => {if (sdk) {sdk.track("page_view", { path: location.pathname });}}, [location]);
};// Hook: 点击埋点
export const useTrackClick = (eventName: string, props?: Record<string, any>) => {return () => {if (sdk) {sdk.track(eventName, props);}};
};// HOC: 包裹组件自动埋点点击
export const withTrackClick = <P extends object>(Component: React.ComponentType<P>,eventName: string,props?: Record<string, any>
) => {return (componentProps: P) => {const handleClick = () => {if (sdk) {sdk.track(eventName, props);}};return <div onClick={handleClick}><Component {...componentProps} /></div>;};
};

3. npm 包目录结构

my-analytics-sdk/
├── package.json
├── tsconfig.json
├── rollup.config.js      # 打包配置
├── src/
│   ├── core.ts           # SDK核心逻辑
│   ├── react.tsx         # React hooks/HOC
│   └── index.ts          # 入口文件

`src/index.ts`

export { AnalyticsSDK } from "./core";
export { initAnalytics, usePageView, useTrackClick, withTrackClick } from "./react";

4. 打包配置（`rollup.config.js`）

import typescript from "@rollup/plugin-typescript";
import { terser } from "rollup-plugin-terser";export default {input: "src/index.ts",output: [{ file: "dist/index.cjs.js", format: "cjs" },{ file: "dist/index.esm.js", format: "esm" },],plugins: [typescript(), terser()],external: ["react", "react-router-dom"],
};

5. 使用示例（React 项目中）

// App.tsx
import React from "react";
import { BrowserRouter, Route, Routes } from "react-router-dom";
import { AnalyticsSDK, initAnalytics, usePageView, useTrackClick } from "my-analytics-sdk";const sdk = new AnalyticsSDK({serverUrl: "https://your-server.com/track",appId: "my-app",
});
initAnalytics(sdk);function Home() {usePageView();const handleClick = useTrackClick("click_home_button", { id: "btn1" });return <button onClick={handleClick}>点我埋点</button>;
}function About() {usePageView();return <div>About Page</div>;
}export default function App() {return (<BrowserRouter><Routes><Route path="/" element={<Home />} /><Route path="/about" element={<About />} /></Routes></BrowserRouter>);
}

✅ 至此，就有了一个 支持 React 路由 + 手动/自动埋点的 SDK，并且能发布成 npm 包。
只需 npm publish 就能在其他项目中直接 npm install my-analytics-sdk 使用。

6. 增加错误监控

加一个 错误监控（window.onerror + unhandledrejection）自动埋点 的功能，让 SDK 既能做埋点又能做异常监控

错误监控其实是前端埋点 SDK 很重要的一部分。我们可以在 SDK 初始化时 自动监听全局的：

window.onerror → 捕获同步 JS 错误 / 资源加载错误
window.onunhandledrejection → 捕获未处理的 Promise 异常

并把这些错误也当作特殊事件（error_event）上报。

6.1 使用方式（React 项目里）

import React from "react";
import { BrowserRouter, Route, Routes } from "react-router-dom";
import { AnalyticsSDK, initAnalytics, usePageView } from "my-analytics-sdk";const sdk = new AnalyticsSDK({serverUrl: "https://your-server.com/track",appId: "my-app",enableErrorTracking: true, // 开启错误监控
});
initAnalytics(sdk);function Home() {usePageView();const throwError = () => {throw new Error("手动触发一个错误试试");};const rejectPromise = () => {Promise.reject("手动触发 Promise 异常");};return (<div><h1>首页</h1><button onClick={throwError}>抛 JS 错误</button><button onClick={rejectPromise}>抛 Promise 错误</button></div>);
}function About() {usePageView();return <div>关于页面</div>;
}export default function App() {return (<BrowserRouter><Routes><Route path="/" element={<Home />} /><Route path="/about" element={<About />} /></Routes></BrowserRouter>);
}

6.2 上报到服务端的错误数据示例

[{"eventName": "error_event","properties": {"type": "js_error","message": "Uncaught Error: 手动触发一个错误试试","source": "http://localhost:3000/static/js/main.js","lineno": 42,"colno": 13,"stack": "Error: 手动触发一个错误试试\n    at onClick..."},"appId": "my-app","userId": "uid_xxx","timestamp": 1693042000000,"url": "http://localhost:3000/","ua": "Mozilla/5.0 ..."}
]