TL;DR: Tiny SPA to capture and group browser JS errors — filters, charts, demo and server modes. Try the "Create test error" button on the demo: https://kate8382.github.io/error-logger-viewer/
Why I built it
What happens when a small idea turns into a few months of late‑night debugging? I wanted a lightweight tool that helps developers see runtime problems quickly, group similar errors, and track fix progress. The app runs in two modes: demo (localStorage) for quick tests and server (Node.js + Express + LowDB) for persistent storage.
What it does
- Captures global JS errors (window.onerror, onunhandledrejection), resource load errors, and fetch failures.
- Groups and deduplicates errors by message/stack to reduce noise.
- Searchable, sortable error table with status tracking (new / in progress / fixed / ignored) and comments.
- Charts for error dynamics (day/week/month), visual filters and quick actions.
- Supports light/dark themes and i18n (EN/RU).
- Accessibility features: ARIA labels and keyboard navigation.
- Tests: Jest (unit) and Cypress (E2E). CI via GitHub Actions.
Quick architecture
Frontend: vanilla ES6 + Webpack, modular components for table, charts and modals.
Backend (optional): Node/Express + LowDB for a simple REST API. Client switches between demo (localStorage) and server modes via a small adapter.
Demo & source
- Live demo: https://kate8382.github.io/error-logger-viewer/
- Source: https://github.com/kate8382/error-logger-viewer
Screenshots
Dashboard — overview, quick stats and theme example.
Error table — search, sorting, status and actions.
Charts — error dynamics by period (week/month/year).
Lessons learned
- Grouping errors across browsers and minified stacks is tricky — tests and careful matching rules help a lot.
- Small UX details (filters, inline status change) make the tool useful for teams.
- Next steps: add a project registration flow (projectKey + drop‑in client snippet) and a lightweight admin to manage multiple projects.
Feedback welcome — what metrics would you add to a simple error dashboard?
Top comments (1)
Thanks for checking this out! If you try the demo, please share one small thing you’d change — your feedback will help shape the next improvements. ❤️