Bugsnag Error Tracking Setup for Web Applications

Production errors hit silently — until they don't

Picture this: a Laravel backend silently fails for 2% of checkout sessions, but only on Tuesdays under specific Redis load. Unit tests pass, staging reproduces nothing, and developers spend two days digging through logs. We integrate Bugsnag to surface these hidden regressions before they compound. With 10+ years in web development (Laravel, React, TypeScript), we configure error tracking that gives you the full context: environment, user actions, and stack traces. The result? A 60% reduction in debugging time on a 500k-user project.

Why Bugsnag over Sentry?

Bugsnag introduces the Stability Score — the percentage of error-free sessions. According to Bugsnag docs, this is the key health metric. For a project with 100,000 monthly sessions, improving Stability Score from 95% to 99% means 4,000 fewer problematic sessions. Bugsnag also prioritizes critical regressions 2x faster with automatic grouping. Free tier covers 7,500 errors/month per project; paid plans increase limits and add priority support.

How we boost your Stability Score

The Stability Score is calculated automatically from SDK data. We configure prioritization: critical crashes are pushed forward, minor warnings filtered out. For example, if the app crashes during cart loading for 2% of users, Bugsnag flags it as a regression. Slack alerts let the team respond in minutes, not hours. On a project with 500,000 users, our setup cut error-to-fix time by 60%.

How we set up Bugsnag

PHP/Laravel installation

composer require bugsnag/bugsnag-laravel php artisan bugsnag:install your-api-key-here 

Add the key, version, and stage in .env. Config and Handler auto-register; exceptions are sent to Bugsnag. Full docs at the official site.

JavaScript/React installation

npm install @bugsnag/js @bugsnag/plugin-react 

Initialize with React plugin and ErrorBoundary:

Bugsnag.start({ apiKey: import.meta.env.VITE_BUGSNAG_API_KEY, plugins: [new BugsnagPluginReact()], releaseStage: import.meta.env.MODE, enabledReleaseStages: ['production', 'staging'], appVersion: import.meta.env.VITE_APP_VERSION, onError: (event) => { const user = getCurrentUser(); if (user) { event.setUser(user.id, user.email, user.name); } if (event.errors[0].errorMessage.includes('ResizeObserver')) { return false; } }, }); 

Wrap the root component with ErrorBoundary to show a fallback UI on error.

Source Maps and Breadcrumbs

npm install --save-dev @bugsnag/source-maps npx bugsnag-source-maps upload-browser \ --api-key $BUGSNAG_API_KEY \ --app-version $APP_VERSION \ --directory dist/assets \ --base-url https://example.com/assets/ 

Breadcrumbs are recorded automatically (clicks, navigation, console.log). Add manual ones with leaveBreadcrumb.

Bugsnag.leaveBreadcrumb('User pressed checkout', { cartTotal: 129.99, currency: 'USD', });