All Javascript skills
Best Claude Code skills for testing on Javascript (May 2026)
3 curated Claude Code skills that handle testing on Javascript projects. Install commands, configs, and copy-paste setup, refreshed May 2026.
3 items matching Javascript & Testing.
Mutation Testing
Validate test effectiveness with mutation testing using Stryker (TypeScript/JavaScript with Vitest or bun test via @hughescr/stryker-bun-runner) and mutmut (Python). Find weak tests that pass despite code mutations. Use to improve test quality.
pythontypescriptjavascripttesting
Playwright
Browser automation and E2E testing with Playwright. Auto-detects dev servers, writes clean test scripts. Test pages, fill forms, take screenshots, check responsive design, validate UX, test login flows, check links, automate any browser task. Use for cross-browser testing, visua…
pythontypescriptjavascripttesting+3
Vitest Testing
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.
typescriptjavascripttesting