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- Install @sentry/nextjs - Configure Sentry with placeholder DSN - Update next.config.ts - Add test page at /sentry-test
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WalkthroughSentry error tracking is integrated into the Next.js application through separate configuration files for client, server, and edge environments. The Next.js configuration is wrapped with Sentry settings. The Changes
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Summary of ChangesHello @thamam, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces Sentry observability into the application, providing robust error tracking capabilities. By integrating Sentry, the project gains the ability to monitor and report errors from client-side, edge, and server-side code, significantly enhancing debugging and operational insights. The changes include necessary configuration updates and a dedicated page to facilitate testing of the new error reporting system. Highlights
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Code Review
This pull request integrates Sentry for error tracking by adding the necessary dependency, configuration files, and a test page. My review identifies several critical issues related to hardcoded placeholder values in the Sentry configuration. These values for org, project, and dsn must be externalized into environment variables for the integration to function correctly and securely. Additionally, I've provided a suggestion to prevent the test page from being accessible in production environments, which is a recommended practice.
| org: "example-org", | ||
| project: "example-project", |
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The Sentry org and project are hardcoded with placeholder values. This will prevent Sentry from working correctly. These values should be externalized to environment variables to allow for different configurations across environments (e.g., development, staging, production).
| org: "example-org", | |
| project: "example-project", | |
| org: process.env.SENTRY_ORG, | |
| project: process.env.SENTRY_PROJECT, |
| import * as Sentry from "@sentry/nextjs"; | ||
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| Sentry.init({ | ||
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", |
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The Sentry DSN is hardcoded with a placeholder value. This will prevent errors from being reported to Sentry. The DSN should be stored in an environment variable. For client-side code, Next.js requires environment variables to be prefixed with NEXT_PUBLIC_.
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", | |
| dsn: process.env.NEXT_PUBLIC_SENTRY_DSN, |
| import * as Sentry from "@sentry/nextjs"; | ||
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| Sentry.init({ | ||
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", |
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The Sentry DSN is hardcoded with a placeholder value. This will prevent errors from being reported to Sentry. The DSN should be stored in an environment variable. It's a good practice to use process.env.NEXT_PUBLIC_SENTRY_DSN for consistency with the client configuration, or process.env.SENTRY_DSN if it should not be exposed to the browser.
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", | |
| dsn: process.env.NEXT_PUBLIC_SENTRY_DSN, |
| import * as Sentry from "@sentry/nextjs"; | ||
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| Sentry.init({ | ||
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", |
There was a problem hiding this comment.
The Sentry DSN is hardcoded with a placeholder value. This will prevent errors from being reported to Sentry. The DSN should be stored in an environment variable. It's a good practice to use process.env.NEXT_PUBLIC_SENTRY_DSN for consistency with the client configuration, or process.env.SENTRY_DSN if it should not be exposed to the browser.
| dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", | |
| dsn: process.env.NEXT_PUBLIC_SENTRY_DSN, |
| import React from "react"; | ||
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| export default function SentryTestPage() { | ||
| return ( | ||
| <div className="flex min-h-screen flex-col items-center justify-center bg-gray-100 p-4"> | ||
| <div className="w-full max-w-md rounded-lg bg-white p-8 shadow-md"> | ||
| <h1 className="mb-6 text-2xl font-bold text-gray-800">Sentry Test Page</h1> | ||
| <p className="mb-6 text-gray-600"> | ||
| Click the button below to throw a test error and verify Sentry integration. | ||
| </p> | ||
| <button | ||
| type="button" | ||
| className="w-full rounded-md bg-red-600 px-4 py-2 text-white transition-colors hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-red-500 focus:ring-offset-2" | ||
| onClick={() => { | ||
| throw new Error("Sentry Test Error"); | ||
| }} | ||
| > | ||
| Throw Test Error | ||
| </button> | ||
| </div> | ||
| </div> | ||
| ); | ||
| } |
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This test page is useful for verifying the Sentry integration, but it shouldn't be accessible in a production environment. Exposing test pages can be unprofessional and could potentially be misused to spam your Sentry project with errors. It's better to make this page available only during development. You can achieve this by checking process.env.NODE_ENV and calling notFound() from next/navigation in production.
import React from "react";
import { notFound } from "next/navigation";
export default function SentryTestPage() {
if (process.env.NODE_ENV === "production") {
notFound();
}
return (
<div className="flex min-h-screen flex-col items-center justify-center bg-gray-100 p-4">
<div className="w-full max-w-md rounded-lg bg-white p-8 shadow-md">
<h1 className="mb-6 text-2xl font-bold text-gray-800">Sentry Test Page</h1>
<p className="mb-6 text-gray-600">
Click the button below to throw a test error and verify Sentry integration.
</p>
<button
type="button"
className="w-full rounded-md bg-red-600 px-4 py-2 text-white transition-colors hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-red-500 focus:ring-offset-2"
onClick={() => {
throw new Error("Sentry Test Error");
}}
>
Throw Test Error
</button>
</div>
</div>
);
}
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Actionable comments posted: 0
🧹 Nitpick comments (4)
learningisfun-app/sentry.server.config.ts (1)
1-8: Use env-driven DSN and avoid hard‑coding in server configRight now the server DSN is a static example URL. For real usage you’ll want to read this from environment (and keep real values out of the repo) and ideally share common options across client/server/edge.
Example refactor:
-import * as Sentry from "@sentry/nextjs"; - -Sentry.init({ - dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", - - // Setting this option to true will print useful information to the console while you're setting up Sentry. - debug: false, -}); +import * as Sentry from "@sentry/nextjs"; + +Sentry.init({ + dsn: process.env.SENTRY_DSN, + // Consider making this env-driven too, e.g. only true in development: + debug: process.env.NODE_ENV === "development", +});You could also extract a small helper (e.g.
getSentryOptions()) and reuse it in the client/edge configs to keep DSN, environment, and release settings in sync.learningisfun-app/sentry.edge.config.ts (1)
1-8: Align edge config with server and source DSN from envThe edge config also hard‑codes the example DSN. For actual deployments, you’ll want to pull this from env (and keep the real DSN out of source) and keep options consistent with the server config.
For example:
-import * as Sentry from "@sentry/nextjs"; - -Sentry.init({ - dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", - - // Setting this option to true will print useful information to the console while you're setting up Sentry. - debug: false, -}); +import * as Sentry from "@sentry/nextjs"; + +Sentry.init({ + dsn: process.env.SENTRY_DSN, + debug: process.env.NODE_ENV === "development", +});(Using
process.env.SENTRY_DSNis fine here because Next inlines env vars at build time for edge runtimes.)learningisfun-app/sentry.client.config.ts (1)
1-8: UseNEXT_PUBLIC_env var for client DSN and keep options consistentFor the browser bundle, it’s better to source the DSN from a
NEXT_PUBLIC_env var instead of hard‑coding the example URL, and to keep common options (env, release, sampling) aligned with server/edge.Example:
-import * as Sentry from "@sentry/nextjs"; - -Sentry.init({ - dsn: "https://examplePublicKey@o0.ingest.sentry.io/0", - - // Setting this option to true will print useful information to the console while you're setting up Sentry. - debug: false, -}); +import * as Sentry from "@sentry/nextjs"; + +Sentry.init({ + dsn: process.env.NEXT_PUBLIC_SENTRY_DSN, + debug: process.env.NODE_ENV === "development", +});You can then share a small helper between this file and the server/edge configs so DSN,
environment,release, and any sampling config all live in one place.learningisfun-app/app/sentry-test/page.tsx (1)
1-25: Test page implementation is solid; consider gating/removing in productionThe page is a clean way to manually verify Sentry wiring (explicit
throw new Errorin the click handler, good button semantics and styling). Once you’re confident in the integration, you may want to either remove/sentry-testor guard it behind an env flag / auth check so end users can’t trivially crash a page in production.
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⛔ Files ignored due to path filters (1)
learningisfun-app/package-lock.jsonis excluded by!**/package-lock.json
📒 Files selected for processing (6)
learningisfun-app/app/sentry-test/page.tsx(1 hunks)learningisfun-app/next.config.ts(1 hunks)learningisfun-app/package.json(1 hunks)learningisfun-app/sentry.client.config.ts(1 hunks)learningisfun-app/sentry.edge.config.ts(1 hunks)learningisfun-app/sentry.server.config.ts(1 hunks)
🔇 Additional comments (2)
learningisfun-app/next.config.ts (1)
8-43: Sentry wrapper looks good; double‑check org/project, sourcemap upload, and tunnel routeThe
withSentryConfigusage and options look aligned with Sentry’s Next.js examples. Before relying on this in CI, a few things to confirm:
- Replace
org: "example-org"/project: "example-project"with your real values (or load them from env) so sourcemaps upload to the correct Sentry project.- Ensure your CI sets the required Sentry auth/env vars; otherwise builds may warn or fail when uploading sourcemaps.
- Verify that
/monitoringdoesn’t conflict with any existing route or middleware, per your own comment, so client error reporting via the tunnel doesn’t get intercepted.learningisfun-app/package.json (1)
12-12: @sentry/nextjs@10.27.0 is compatible with Next 16.0.3 and React 19.2.0The peer dependency declaration (
next: '^13.2.0 || ^14.0 || ^15.0.0-rc.0 || ^16.0.0-0') explicitly supports Next.js 16.0.3. Version 10.27.0 (released November 2025) includes React 19 support via updated Sentry JS packages.
⚠️ Minor caveat: Some ecosystem packages may still pin older React ranges, causing install-time peer-dependency warnings. If this occurs, usenpm install --legacy-peer-depsas a workaround, and validate runtime behavior in your app.
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Integrates Sentry for error tracking. Includes configuration files, next.config.ts update, and a test page.
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