JavaScript

On this page, we get you up and running with Sentry's SDK, so that it will automatically report errors and exceptions in your application.

Don't already have an account and Sentry project established? Head over to sentry.io, then return to this page.

Install

Sentry captures data by using an SDK within your application’s runtime.

Copied
yarn add @sentry/browser @sentry/tracing

If you're updating your Sentry SDK to the latest version, check out our migration guide to learn more about breaking changes.

Configure

Configuration should happen as early as possible in your application's lifecycle.

Once this is done, Sentry's JavaScript SDK captures all unhandled exceptions and transactions.

Copied
import * as Sentry from "@sentry/browser";
import { BrowserTracing } from "@sentry/tracing";

Sentry.init({
  dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",

  // Alternatively, use `process.env.npm_package_version` for a dynamic release version
  // if your build tool supports it.
  release: "my-project-name@2.3.12",
  integrations: [new BrowserTracing()],

  // Set tracesSampleRate to 1.0 to capture 100%
  // of transactions for performance monitoring.
  // We recommend adjusting this value in production
  tracesSampleRate: 1.0,

});

Verify

This snippet includes an intentional error, so you can test that everything is working as soon as you set it up:

Copied
myUndefinedFunction();

To view and resolve the recorded error, log into sentry.io and open your project. Clicking on the error's title will open a page where you can see detailed information and mark it as resolved.

Add Readable Stack Traces to Errors

Depending on how you've set up your JavaScript project, the stack traces in your Sentry errors probably don't look like your actual code.

To fix this, head over to our source maps documentation where you'll learn how to upload source maps, so you can make sense of your stack traces.

Help improve this content
Our documentation is open source and available on GitHub. Your contributions are welcome, whether fixing a typo (drat!) to suggesting an update ("yeah, this would be better").