# Webapp Testing Error Handling

> Sub-skill of webapp-testing: Error Handling.

- Skill: `vamseeachanta/webapp-testing-error-handling` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/webapp-testing-error-handling`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/webapp-testing-error-handling/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/webapp-testing-error-handling

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# Error Handling

## Error Handling


### Common Errors


| Error | Cause | Solution |
|-------|-------|----------|
| `TimeoutError` | Element not found in time | Use explicit waits or increase timeout |
| `Page closed` | Browser closed prematurely | Check cleanup order in fixtures |
| `Connection refused` | Server not running | Start server before tests |
| `Element not visible` | Hidden by CSS/JS | Wait for visibility state |
| `Target closed` | Navigation during action | Wait for navigation to complete |
### Debugging Tips


```python
# Increase default timeout
page.set_default_timeout(60000)  # 60 seconds

# Take screenshot on failure
try:
    page.click("#submit")
except Exception as e:
    page.screenshot(path="error_screenshot.png")
    raise

# Print page HTML for debugging
print(page.content())
```