# Javascript Development > This skill should be used when implementing or reviewing JavaScript or TypeScript logic, async control flow, browser or Node behavior, and modern language patterns. Use when this capability is needed. - Skill: `tomevault-io/javascript-development` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/javascript-development` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/javascript-development/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/javascript-development --- # JavaScript Development Apply this skill when JavaScript or TypeScript language decisions matter. ## Focus areas - Async and event-driven behavior - Type safety and API ergonomics - Browser and Node runtime differences - Module boundaries and reuse - Performance and memory characteristics ## Workflow 1. Prefer clear data flow over clever abstractions. 2. Use types to document contracts where available. 3. Handle async failure paths explicitly. 4. Avoid unnecessary re-renders or repeated work. 5. Add focused tests around transformations and edge cases. ## Deliverables - Language-level implementation guidance - Type and async handling recommendations - Performance notes for critical paths - Suggested tests for tricky behavior --- > Source: [azri-cs/opencode-config](https://github.com/azri-cs/opencode-config) — distributed by [TomeVault](https://tomevault.io).