Javascript Async Error Handling Browser Async Error Handling V18

---
id: javascript.async-error-handling.browser-async-error-handling-v18
name: Browser Async Error Handling v18+
description: >
  Reviews asynchronous JavaScript error handling in browser-facing code, focusing on user-facing failure states, safe fallbacks, retry behavior, and preserved error context.
stack:
  - JavaScript
  - TypeScript
  - Browser
category: javascript
status: stable
version: 0.10.0
owner: NgAutoPilot
triggers:
  - browser async error handling
  - web async handling
  - browser promise errors
  - user facing failure state
  - retry behavior
  - browser rejection handling
compatibility:
  runtime:
    browser: true
---

# Browser Async Error Handling v18+

## Purpose

Use this skill for browser-facing async error handling where user experience and safe fallback behavior matter.

This variant emphasizes failure visibility in UI, retry behavior, and safe continuation when the browser can recover.

## When to Use

Use this skill when:

- the runtime is browser-based
- user-facing failure states are needed
- retry or fallback UX matters
- async operations drive UI state

## Do

Surface errors in a user-visible way.

Keep fallbacks semantically valid.

Use retry when the condition may recover.

Preserve technical context for logs and telemetry.

## Do Not

Avoid silent UI failure.

Avoid fake success states.

Avoid browser guidance that assumes Node-style process control.

## Review Checklist

- [ ] Browser runtime is explicit.
- [ ] Failure states are user-visible.
- [ ] Retry and fallback are intentional.
- [ ] Error context is preserved.

## Expected Output

1. Review browser-facing failure paths.
2. Recommend safe fallbacks and retry behavior.
3. Preserve error context for telemetry.
4. Keep UX recoverable.
5. Produce browser-specific guidance.