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Implement analytics, error monitoring, and performance tracking with Vercel Analytics, Google Analytics, Sentry, and custom event tracking.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Build accessible portfolio websites following WCAG guidelines with proper semantics, keyboard navigation, screen reader support, and inclusive design patterns.
Build server-side APIs using Next.js Server Actions and API routes.
Build production-ready contact forms with React Hook Form, Zod validation, Server Actions, and email services like Resend.
Manage portfolio content with MDX, Contentlayer, or local JSON for projects, blog posts, and dynamic content.
Implement robust dark mode and theming systems with next-themes, CSS custom properties, and Tailwind CSS for seamless user experience.
Deploy applications to production using Vercel CLI commands.
| name | analytics-monitoring |
| description | Implement analytics, error monitoring, and performance tracking with Vercel Analytics, Google Analytics, Sentry, and custom event tracking. |
| author | Jaivish Chauhan @ GDG SSIT |
| version | 1.0.0 |
| url | https://github.com/JaivishChauhan/vibecoding-starter |
A production portfolio needs:
npm install @vercel/analytics @vercel/speed-insights
// app/layout.tsx
import { Analytics } from "@vercel/analytics/react";
import { SpeedInsights } from "@vercel/speed-insights/next";
export default function RootLayout({
children,
}: {
children: React.ReactNode;
}) {
return (
<html lang="en">
<body>
{children}
<Analytics />
<SpeedInsights />
</body>
</html>
);
}
// lib/analytics.ts
import { track } from "@vercel/analytics";
/**
* Track custom events with type safety.
*/
export const trackEvent = {
// Contact form submission
contactSubmitted: () => track("contact_submitted"),
// Project viewed
projectViewed: (projectSlug: string) =>
track("project_viewed", { project: projectSlug }),
// Resume downloaded
resumeDownloaded: () => track("resume_downloaded"),
// External link clicked
externalLinkClicked: (url: string) => track("external_link_clicked", { url }),
// Social link clicked
socialClicked: (platform: string) => track("social_clicked", { platform }),
// CTA clicked
ctaClicked: (location: string, action: string) =>
track("cta_clicked", { location, action }),
};
// Usage in components
import { trackEvent } from "@/lib/analytics";
function ContactForm() {
const onSuccess = () => {
trackEvent.contactSubmitted();
};
}
function ProjectCard({ project }) {
return (
<Link
href={`/projects/${project.slug}`}
onClick={() => trackEvent.projectViewed(project.slug)}
>
{/* ... */}
</Link>
);
}
npm install @next/third-parties
// app/layout.tsx
import { GoogleAnalytics } from "@next/third-parties/google";
export default function RootLayout({
children,
}: {
children: React.ReactNode;
}) {
return (
<html lang="en">
<body>
{children}
<GoogleAnalytics gaId="G-XXXXXXXXXX" />
</body>
</html>
);
}
// components/google-analytics.tsx
"use client";
import Script from "next/script";
import { usePathname, useSearchParams } from "next/navigation";
import { useEffect, Suspense } from "react";
const GA_MEASUREMENT_ID = process.env.NEXT_PUBLIC_GA_MEASUREMENT_ID;
/**
* Google Analytics 4 implementation.
* @security Only loads in production to avoid polluting dev data.
*/
function GoogleAnalyticsInner() {
const pathname = usePathname();
const searchParams = useSearchParams();
useEffect(() => {
if (!GA_MEASUREMENT_ID || process.env.NODE_ENV !== "production") return;
const url = pathname + searchParams.toString();
// Track page view
window.gtag?.("config", GA_MEASUREMENT_ID, {
page_path: url,
});
}, [pathname, searchParams]);
if (!GA_MEASUREMENT_ID || process.env.NODE_ENV !== "production") {
return null;
}
return (
<>
<Script
strategy="afterInteractive"
src={`https://www.googletagmanager.com/gtag/js?id=${GA_MEASUREMENT_ID}`}
/>
<Script
id="google-analytics"
strategy="afterInteractive"
dangerouslySetInnerHTML={{
__html: `
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', '${GA_MEASUREMENT_ID}', {
page_path: window.location.pathname,
});
`,
}}
/>
</>
);
}
export function GoogleAnalytics() {
return (
<Suspense fallback={null}>
<GoogleAnalyticsInner />
</Suspense>
);
}
// lib/gtag.ts
declare global {
interface Window {
gtag: (
command: "config" | "event" | "js" | "set",
targetId: string,
config?: Record<string, unknown>,
) => void;
}
}
export const GA_MEASUREMENT_ID = process.env.NEXT_PUBLIC_GA_MEASUREMENT_ID;
/**
* Track page views.
*/
export function pageview(url: string) {
if (!GA_MEASUREMENT_ID) return;
window.gtag?.("config", GA_MEASUREMENT_ID, {
page_path: url,
});
}
/**
* Track events.
*/
export function event(
action: string,
category: string,
label?: string,
value?: number,
) {
if (!GA_MEASUREMENT_ID) return;
window.gtag?.("event", action, {
event_category: category,
event_label: label,
value: value,
});
}
// Predefined events
export const gaEvents = {
contactSubmit: () => event("submit", "contact_form"),
resumeDownload: () => event("download", "resume"),
projectView: (name: string) => event("view", "project", name),
socialClick: (platform: string) => event("click", "social", platform),
};
// types/gtag.d.ts
interface GtagEventParams {
event_category?: string;
event_label?: string;
value?: number;
page_path?: string;
[key: string]: unknown;
}
interface Window {
gtag: (
command: "config" | "event" | "js" | "set",
targetId: string,
config?: GtagEventParams,
) => void;
dataLayer: unknown[];
}
npx @sentry/wizard@latest -i nextjs
Or manually:
npm install @sentry/nextjs
// sentry.client.config.ts
import * as Sentry from "@sentry/nextjs";
Sentry.init({
dsn: process.env.NEXT_PUBLIC_SENTRY_DSN,
// Performance monitoring
tracesSampleRate: 1.0, // Capture 100% of transactions (reduce in prod)
// Session replay
replaysSessionSampleRate: 0.1, // Capture 10% of sessions
replaysOnErrorSampleRate: 1.0, // Capture 100% on error
integrations: [
Sentry.replayIntegration({
maskAllText: false,
blockAllMedia: false,
}),
],
// Only enable in production
enabled: process.env.NODE_ENV === "production",
// Filter out known non-issues
ignoreErrors: [
"ResizeObserver loop limit exceeded",
"Non-Error promise rejection",
],
beforeSend(event) {
// Scrub sensitive data
if (event.request?.cookies) {
delete event.request.cookies;
}
return event;
},
});
// sentry.server.config.ts
import * as Sentry from "@sentry/nextjs";
Sentry.init({
dsn: process.env.NEXT_PUBLIC_SENTRY_DSN,
tracesSampleRate: 1.0,
enabled: process.env.NODE_ENV === "production",
});
// sentry.edge.config.ts
import * as Sentry from "@sentry/nextjs";
Sentry.init({
dsn: process.env.NEXT_PUBLIC_SENTRY_DSN,
tracesSampleRate: 1.0,
enabled: process.env.NODE_ENV === "production",
});
// next.config.js
const { withSentryConfig } = require("@sentry/nextjs");
const nextConfig = {
// Your config
};
module.exports = withSentryConfig(
nextConfig,
{
// Sentry webpack plugin options
silent: true,
org: "your-org",
project: "your-project",
},
{
// Sentry SDK options
widenClientFileUpload: true,
tunnelRoute: "/monitoring-tunnel",
hideSourceMaps: true,
disableLogger: true,
},
);
// components/error-boundary.tsx
"use client";
import * as Sentry from "@sentry/nextjs";
import { useEffect } from "react";
interface ErrorBoundaryProps {
error: Error & { digest?: string };
reset: () => void;
}
/**
* Global error boundary for catching and reporting errors.
*/
export default function GlobalError({ error, reset }: ErrorBoundaryProps) {
useEffect(() => {
Sentry.captureException(error);
}, [error]);
return (
<html>
<body>
<div className="flex min-h-screen flex-col items-center justify-center">
<h2 className="text-2xl font-bold">Something went wrong!</h2>
<p className="mt-2 text-zinc-400">
We've been notified and are working on a fix.
</p>
<button
onClick={reset}
className="mt-4 rounded-lg bg-brand-500 px-4 py-2 text-white"
>
Try again
</button>
</div>
</body>
</html>
);
}
// lib/error.ts
import * as Sentry from "@sentry/nextjs";
/**
* Capture error with context.
*/
export function captureError(error: Error, context?: Record<string, unknown>) {
Sentry.captureException(error, {
extra: context,
});
}
/**
* Capture message/warning.
*/
export function captureMessage(
message: string,
level: "info" | "warning" | "error" = "info",
) {
Sentry.captureMessage(message, level);
}
/**
* Set user context for error tracking.
*/
export function setUser(user: { id: string; email?: string }) {
Sentry.setUser(user);
}
/**
* Clear user context (on logout).
*/
export function clearUser() {
Sentry.setUser(null);
}
// Usage
try {
await riskyOperation();
} catch (error) {
captureError(error as Error, {
operation: "riskyOperation",
userId: user.id,
});
}
// components/web-vitals.tsx
"use client";
import { useReportWebVitals } from "next/web-vitals";
/**
* Report Web Vitals to analytics.
*/
export function WebVitals() {
useReportWebVitals((metric) => {
// Log to console in development
if (process.env.NODE_ENV === "development") {
console.log(metric);
}
// Send to Google Analytics
const { id, name, label, value } = metric;
window.gtag?.("event", name, {
event_category: label === "web-vital" ? "Web Vitals" : "Next.js Metrics",
event_label: id,
value: Math.round(name === "CLS" ? value * 1000 : value),
non_interaction: true,
});
// Or send to custom endpoint
fetch("/api/vitals", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
id,
name,
label,
value,
page: window.location.pathname,
}),
});
});
return null;
}
// app/api/vitals/route.ts
import { NextRequest, NextResponse } from "next/server";
interface VitalsData {
id: string;
name: string;
label: string;
value: number;
page: string;
}
export async function POST(request: NextRequest) {
try {
const data: VitalsData = await request.json();
// Log vitals (replace with your analytics service)
console.log("Web Vital:", {
metric: data.name,
value: data.value,
page: data.page,
rating: getVitalRating(data.name, data.value),
});
// Send to analytics service
// await sendToAnalytics(data);
return NextResponse.json({ success: true });
} catch (error) {
return NextResponse.json({ success: false }, { status: 500 });
}
}
function getVitalRating(
name: string,
value: number,
): "good" | "needs-improvement" | "poor" {
const thresholds: Record<string, [number, number]> = {
LCP: [2500, 4000],
FID: [100, 300],
CLS: [0.1, 0.25],
FCP: [1800, 3000],
TTFB: [800, 1800],
INP: [200, 500],
};
const [good, poor] = thresholds[name] || [0, 0];
if (value <= good) return "good";
if (value <= poor) return "needs-improvement";
return "poor";
}
// lib/events/types.ts
/**
* All trackable events with their payloads.
*/
export type AnalyticsEvent =
| { name: "page_view"; properties: { path: string; title: string } }
| { name: "contact_submitted"; properties: { subject: string } }
| {
name: "project_viewed";
properties: { projectId: string; projectName: string };
}
| { name: "resume_downloaded"; properties: Record<string, never> }
| { name: "social_clicked"; properties: { platform: string } }
| { name: "cta_clicked"; properties: { location: string; action: string } }
| { name: "scroll_depth"; properties: { depth: number; page: string } }
| { name: "time_on_page"; properties: { seconds: number; page: string } };
export type EventName = AnalyticsEvent["name"];
export type EventProperties<T extends EventName> = Extract<
AnalyticsEvent,
{ name: T }
>["properties"];
// lib/events/tracker.ts
import { track as vercelTrack } from "@vercel/analytics";
import * as Sentry from "@sentry/nextjs";
import type { EventName, EventProperties } from "./types";
/**
* Unified event tracking across all analytics providers.
*/
class EventTracker {
private debug = process.env.NODE_ENV === "development";
track<T extends EventName>(name: T, properties: EventProperties<T>) {
if (this.debug) {
console.log(`[Analytics] ${name}`, properties);
}
// Vercel Analytics
vercelTrack(name, properties);
// Google Analytics
window.gtag?.("event", name, properties);
// Sentry breadcrumb
Sentry.addBreadcrumb({
category: "analytics",
message: name,
data: properties,
level: "info",
});
}
// Convenience methods
pageView(path: string, title: string) {
this.track("page_view", { path, title });
}
contactSubmitted(subject: string) {
this.track("contact_submitted", { subject });
}
projectViewed(projectId: string, projectName: string) {
this.track("project_viewed", { projectId, projectName });
}
resumeDownloaded() {
this.track("resume_downloaded", {});
}
socialClicked(platform: string) {
this.track("social_clicked", { platform });
}
ctaClicked(location: string, action: string) {
this.track("cta_clicked", { location, action });
}
}
export const analytics = new EventTracker();
// hooks/use-scroll-tracking.ts
"use client";
import { useEffect, useRef } from "react";
import { analytics } from "@/lib/events/tracker";
/**
* Track how far users scroll on a page.
*/
export function useScrollTracking() {
const tracked = useRef(new Set<number>());
const thresholds = [25, 50, 75, 100];
useEffect(() => {
const handleScroll = () => {
const scrollHeight =
document.documentElement.scrollHeight - window.innerHeight;
const scrolled = (window.scrollY / scrollHeight) * 100;
thresholds.forEach((threshold) => {
if (scrolled >= threshold && !tracked.current.has(threshold)) {
tracked.current.add(threshold);
analytics.track("scroll_depth", {
depth: threshold,
page: window.location.pathname,
});
}
});
};
window.addEventListener("scroll", handleScroll, { passive: true });
return () => window.removeEventListener("scroll", handleScroll);
}, []);
}
// hooks/use-time-tracking.ts
"use client";
import { useEffect, useRef } from "react";
import { analytics } from "@/lib/events/tracker";
/**
* Track time spent on a page.
*/
export function useTimeTracking() {
const startTime = useRef(Date.now());
const tracked = useRef(new Set<number>());
const intervals = [30, 60, 120, 300]; // seconds
useEffect(() => {
const checkTime = () => {
const elapsed = Math.floor((Date.now() - startTime.current) / 1000);
intervals.forEach((interval) => {
if (elapsed >= interval && !tracked.current.has(interval)) {
tracked.current.add(interval);
analytics.track("time_on_page", {
seconds: interval,
page: window.location.pathname,
});
}
});
};
const timer = setInterval(checkTime, 5000);
return () => clearInterval(timer);
}, []);
// Track on unmount
useEffect(() => {
return () => {
const elapsed = Math.floor((Date.now() - startTime.current) / 1000);
if (elapsed > 5) {
analytics.track("time_on_page", {
seconds: elapsed,
page: window.location.pathname,
});
}
};
}, []);
}
// components/cookie-consent.tsx
"use client";
import { useState, useEffect } from "react";
import { motion, AnimatePresence } from "framer-motion";
export function CookieConsent() {
const [showBanner, setShowBanner] = useState(false);
useEffect(() => {
const consent = localStorage.getItem("cookie-consent");
if (!consent) {
setShowBanner(true);
}
}, []);
const accept = () => {
localStorage.setItem("cookie-consent", "accepted");
setShowBanner(false);
// Enable analytics here if they were disabled
window.gtag?.("consent", "update", {
analytics_storage: "granted",
});
};
const decline = () => {
localStorage.setItem("cookie-consent", "declined");
setShowBanner(false);
window.gtag?.("consent", "update", {
analytics_storage: "denied",
});
};
return (
<AnimatePresence>
{showBanner && (
<motion.div
initial={{ y: 100, opacity: 0 }}
animate={{ y: 0, opacity: 1 }}
exit={{ y: 100, opacity: 0 }}
className="fixed bottom-0 left-0 right-0 z-50 border-t border-zinc-800 bg-zinc-950 p-4"
>
<div className="container flex flex-col items-center justify-between gap-4 sm:flex-row">
<p className="text-sm text-zinc-400">
This site uses cookies to improve your experience and analyze
traffic.
</p>
<div className="flex gap-2">
<button
onClick={decline}
className="rounded-lg border border-zinc-700 px-4 py-2 text-sm"
>
Decline
</button>
<button
onClick={accept}
className="rounded-lg bg-brand-500 px-4 py-2 text-sm text-white"
>
Accept
</button>
</div>
</div>
</motion.div>
)}
</AnimatePresence>
);
}
// lib/analytics-consent.ts
/**
* Check if user has consented to analytics.
*/
export function hasAnalyticsConsent(): boolean {
if (typeof window === "undefined") return false;
return localStorage.getItem("cookie-consent") === "accepted";
}
/**
* Conditionally track events based on consent.
*/
export function trackWithConsent(
eventName: string,
properties?: Record<string, unknown>,
) {
if (!hasAnalyticsConsent()) return;
// Your tracking logic
window.gtag?.("event", eventName, properties);
}
# .env.local
# Vercel Analytics (auto-configured on Vercel)
# No env needed
# Google Analytics
NEXT_PUBLIC_GA_MEASUREMENT_ID=G-XXXXXXXXXX
# Sentry
NEXT_PUBLIC_SENTRY_DSN=https://xxxxx@xxx.ingest.sentry.io/xxxxx
SENTRY_AUTH_TOKEN=sntrys_xxxxx
SENTRY_ORG=your-org
SENTRY_PROJECT=your-project