Best Claude Code Plugins for Javascript

TypeScript and JavaScript language server integration. Real-time type checking, auto-imports, intelligent refactoring, and code navigation for TypeScript and JavaScript projects.

Bun runtime helper for Claude Code. Run scripts, manage dependencies with bun install, execute tests with bun test, and migrate Node.js projects to Bun with guided codemods.

Build and deploy Base44 full-stack apps with CLI project management and JavaScript/TypeScript SDK development skills

SAPUI5 / OpenUI5 plugin for coding agents. Convert JavaScript based UI5 projects to TypeScript.

Unit and integration test automation for Python and JavaScript with debugging support

JavaScript and TypeScript development with ES6+, Node.js, React, and modern web frameworks

Firecrawl v2.5 API for web scraping/crawling to LLM-ready markdown. Use for site extraction, dynamic content, or encountering JavaScript rendering, bot detection, content loading errors.

Generate Jest unit tests for JavaScript/TypeScript with mocking, coverage. Use for JS/TS modules, React components, test generation, or encountering missing coverage, improper mocking, test structure errors.

Validate test effectiveness with mutation testing using Stryker (TypeScript/JavaScript) and mutmut (Python). Find weak tests that pass despite code mutations. Use to improve test quality.

OpenAI Agents SDK for JavaScript/TypeScript (text + voice agents). Use for multi-agent workflows, tools, guardrails, or encountering Zod errors, MCP failures, infinite loops, tool call issues.

Modern TypeScript/JavaScript testing with Vitest. Fast unit and integration tests, native ESM support, Vite-powered HMR, and comprehensive mocking. Use for testing TS/JS projects.