Error Tracking Web
PostHogOfficialCreated by PostHog
- Skill
- Tool integration
- Data and AI
- MIT
- No issues found
AutoGineer summary
Written by AutoGineer from the skill’s own files, not by the author
This skill provides guidance on implementing PostHog error tracking within JavaScript web applications. It covers SDK initialization, manual exception capture, and best practices for managing error data, including the use of source maps for readable stack traces and proper user identification to avoid PII leakage. The skill also outlines how to configure alerts and automate issue assignment to streamline debugging workflows.
What it does
- Initializes the PostHog JavaScript SDK for browser-based error tracking.
- Enables automatic exception capture for monitoring application crashes and errors.
- Provides methods for manual error capture at specific application boundaries.
- Supports source map uploads to de-minify stack traces for easier debugging.
- Configures automated issue assignment rules based on exception properties.
- Sets up alert notifications for new, reopened, or spiking error issues.
When to use it
- When you need to monitor runtime errors in a JavaScript web application.
- When you want to automate the triage and assignment of software issues to team members.
- When you need to receive real-time alerts for critical application errors or error spikes.
- When you need to correlate frontend errors with user sessions and feature flags.
Advantages
- Centralizes error monitoring and user behavior data in one platform.
- Reduces manual triage time through automated assignment rules.
- Improves debugging efficiency by resolving minified stack traces via source maps.
- Helps maintain data privacy by distinguishing between event properties and user identification.
Usage examples
- “How do I initialize PostHog for error tracking in my React app?”
- The agent provides the posthog.init() code snippet, ensuring it is called before other methods and configured with environment variables for keys and host URLs.
- “How can I alert my team when a specific error spikes?”
- The agent guides you to the error tracking configuration page to set up spike alerts based on historical baselines or event volume.
Install
Download the skill as a ZIP:
https://autogineer.com/agent-skills/posthog/error-tracking-web/downloadUnzip it into the cross-client skills folder of your project:
mkdir -p .agents/skills && unzip error-tracking-web.zip -d .agents/skills
Documentation by PostHog
PostHog error tracking for Web (JavaScript)
This skill helps you add PostHog error tracking to Web (JavaScript) applications.
Reference files
references/web.md- Web error tracking installation - docsreferences/fingerprints.md- Fingerprints - docsreferences/alerts.md- Send error tracking alerts - docsreferences/monitoring.md- Monitor and search issues - docsreferences/assigning-issues.md- Assign issues to teammates - docsreferences/upload-source-maps.md- Upload source maps - docs
Consult the documentation for API details and framework-specific patterns.
Key principles
Environment variables: Always use environment variables for PostHog keys and host URLs. Never hardcode them.
Minimal changes: Add error tracking alongside existing error handling. Don't replace or restructure existing error handling code.
Autocapture first: Enable exception autocapture in the SDK initialization before adding manual captures.
Source maps: Upload source maps so stack traces resolve to original source code, not minified bundles.
Manual capture for boundaries: Use
captureException()at error boundaries and catch blocks for errors that don't propagate to the global handler.
Framework guidelines
Remember that source code is available in the node_modules directory
Check package.json for type checking or build scripts to validate changes
posthog-js is the JavaScript SDK package name
posthog.init() MUST be called before any other PostHog methods (capture, identify, etc.)
posthog-js is browser-only — do NOT import it in Node.js or server-side contexts (use posthog-node instead)
Autocapture is ON by default with posthog-js (tracks clicks, form submissions, pageviews). Do NOT disable autocapture unless the user explicitly requests it.
NEVER send PII in posthog.capture() event properties — no emails, full names, phone numbers, physical addresses, IP addresses, or user-generated content
PII belongs in posthog.identify() person properties (email, name, role), NOT in capture() event properties
Call posthog.identify(userId, { email, name, role }) on login AND on page refresh if the user is already logged in
Call posthog.reset() on logout to unlink future events from the current user
For SPAs without a framework router, capture pageviews with posthog.capture($pageview) or use the capture_pageview history_change option in init for History API routing
Files
- ATTRIBUTION.mdAdded by AutoGineer954 B
- LICENSELicence file added by AutoGineer1.0 KiB
- SKILL.md2.5 KiB
- references/alerts.md4.1 KiB
- references/assigning-issues.md5.5 KiB
- references/fingerprints.md3.4 KiB
- references/monitoring.md8.6 KiB
- references/upload-source-maps.md2.7 KiB
- references/web.md5.4 KiB
references/assigning-issues.md
Assign issues to teammates - Docs
Error tracking enables you to assign issues to specific PostHog roles or teammates. This helps your team find relevant issues through filtering. You can also set up team-specific alerting to notify them when assigned issues are created or reopened.
Assign issues
You can manually assign issues as you triage them in the UI. This can be done both in the issue list and issue detail pages.
Image: Error tracking assignment UIImage: Error tracking assignment UI
In your error tracking issue list, click the unassigned selector under each issue to assign it to a role or user.
On the detail page of each issue, click the Assignee selector to assign it to a role or user.
Want to assign issues to a team rather than an individual teammate? You can create a role in your project settings.
Image: Error tracking role assigneesImage: Error tracking role assignees
Automatic issue assignment
You can set up automatic issue assignment through a set of rules. This can be configured in the error tracking settings using auto assignment rules.
Image: Error tracking auto assignment rulesImage: Error tracking auto assignment rules
Assignment conditions are evaluated against the properties of the exception event that created the issue. Because assignment rules are evaluated during ingestion, the stack trace (if present) will be unminified, which enables filtering on exception properties such as function name and source file.
Issues can be automatically assigned to a role or user by configuring a set of filters. These filters can be configured to match any or all of the criteria.
You can configure automatic assignment to filter on any event property in PostHog. When there are multiple values for a property, the filters return true if it matches any of the values. For example, if you have multiple exception_functions values, the filters returns true if it matches any of the functions.
Here are some common properties you can filter on:
| Property | Event property | Description |
|---|---|---|
| Exception type | $exception_types | The type of exception(s) that occurred |
| Exception message | $exception_values | The message(s) detected on the error |
| Exception function | $exception_functions | The function(s) where the exception occurred |
| Exception source | $exception_sources | The source file(s) where the exception occurred |
| Exception was handled | $exception_handled | Whether the exception was handled by the application |
| Device type | $device_type | The type of device that the error occurred on |
| Browser | $browser | The browser that the error occurred in |
| Current URL | $current_url | The URL that the error occurred on |
| Feature flag | $feature_flag | The feature flag that the error occurred on |
You can also set custom properties on the error tracking event to filter on. For example, setting a custom params_received property to provide more context or debug information.
Order of issue assignment rules
Issue assignment filters are evaluated in the order they are configured. They can also be reordered once created. The first filter that matches is used to assign the issue. This means you should configure the most specific filters first, and then the more general filters later.
Disabled assignment rules
Assignment rules can become disabled if an error occurs during ingestion. When a rule is disabled, a banner displays the original error message. To re-enable the rule, edit it to fix the problem and save your changes. If the issue persists, reach out to support.
Alerting based on assignment
A common use case for automatic issue assignment is to alert assignees of new issues. Once the issues are automatically assigned, you can set up alerts to notify the assignee. See the alerts guide for more information.
Create external issues
You can also create issues in external tracking systems like GitHub Issues, Linear, GitLab, or Jira.
First, set up an integration with your tracking system. Then, from an issue's details page, under External references, click Create issue.
Image: Error tracking create issue in external tracking systemImage: Error tracking create issue in external tracking system
The new issue will have a partial stack trace and a link to the issue in PostHog.
If you use another issue tracking system and would like to request it, let us know in-app.
Community questions
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Requirements and compatibility
Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta
“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.
Needs: Needs Node.js
Security
No issues found by our static scan· No issues found
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Attribution and licence
- Created by
- PostHog
- Publisher
- PostHog (Official)
- Source
- PostHog/skills · skills/posthog/error-tracking/skills/web · commit a5d30e7
- Licence
- MIT License (redistribution allowed)
- LICENSE (added by AutoGineer from LICENSE)
- ATTRIBUTION.md (written by AutoGineer)
- Synced
- Also distributed in
- PostHog/skills
AutoGineer is not affiliated with or endorsed by PostHog or PostHog.
Download ZIP
The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download error-tracking-web.zip