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Lwc Custom Event Patterns

Category: General  ·  Sub-category: general-misc  ·  Last updated:
When and how to design CustomEvent traffic out of an LWC — bubbles / composed / cancelable flag choices, detail payload shape, naming rules, and propagation control. Trigger keywords: 'event not reaching parent', 'composed shadow DOM', 'CustomEvent detail mutation', 'stopPropagation vs stopImmediatePropagation'. NOT for parent-to-child communication (use `@api` — see `lwc/component-communication`), NOT for sibling fan-out (use Lightning Message Service — see `lwc/lightning-message-service`), NOT for wire-service data plumbing.

From the source SKILL.md

Activate this skill when a Lightning Web Component needs to emit an event upward — to its parent, an ancestor, an Aura host, or out of a slot — and the question is which combination of bubbles, composed, and cancelable to use, what the detail payload should look like, and how to name the event so it actually fires. The four flag combinations behave very differently across light DOM, shadow DOM, and Aura host boundaries, and the wrong combination silently drops the event with no error.

What this skill does

Lwc Custom Event Patterns is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/lwc-custom-event-patterns/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Lwc Custom Event Patterns Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/lwc-custom-event-patterns
curl -L https://claudskills.com/skills/lwc-custom-event-patterns/SKILL.md \
  -o ~/.claude/skills/lwc-custom-event-patterns/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/lwc-custom-event-patterns/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/lwc-custom-event-patterns/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\lwc-custom-event-patterns\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

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Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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