Showcase Your Vitest Skills with a GitHub README Badge

Use this markdown in your README:

![Vitest](https://img.shields.io/badge/Vitest-6E9F18?style=for-the-badge&logo=vitest&logoColor=white)

The #6E9F18 is Vitest's official green — a muted green that reflects the Vitest logo's color scheme. The vitest logo identifier renders Vitest's logo from Simple Icons. This green badge pairs well with Vue.js (also green) or can anchor a modern testing section alongside Cypress.

Vitest's API mirrors Jest closely, but its integration with Vite's ecosystem is where it excels. Highlight specific usage that demonstrates you understand the tool's strengths:

• Configuration: Zero-config setup in Vite projects, shared vite.config.ts for test and build
• Test patterns: describe, it, expect, vi.fn() mocks, vi.spyOn() spies
• Coverage: V8 or Istanbul coverage providers, threshold enforcement in CI
• UI: Vitest UI for visual test inspection and debugging
• Component testing: @vitest/browser for real browser component tests
• Snapshot testing: Inline snapshots and file snapshots

Mentioning that you run Vitest with coverage thresholds enforced in CI is a strong signal of test discipline rather than test theater.

Vitest fits naturally in modern Vite-based frontend stacks:

• Vue.js stack: Vitest + Vue.js + Vue Testing Library + Cypress
• React/Vite stack: Vitest + React + React Testing Library + Cypress
• SvelteKit stack: Vitest + Svelte + Testing Library + Playwright
• Library development: Vitest + TypeScript + tsup/Rollup

Vitest and Jest are the dominant unit testing choices. If your project migrated from Jest to Vitest, that migration experience is worth mentioning — it demonstrates knowledge of build tooling beyond just writing tests. The migration path (updating imports from jest to vitest, adjusting config) is non-trivial and shows ecosystem depth.

Vitest test files are TypeScript or JavaScript, contributing to your primary language stats. The presence of vitest.config.ts or test files in a repository signals testing maturity to anyone reading your code.

For pinned repositories, the combination of well-organized tests, coverage reporting, and a passing test badge in the README is compelling. A coverage: 85% shield badge from Codecov or Coveralls next to your Vitest setup turns abstract test claims into verifiable numbers. Test coverage percentages in READMEs are one of the strongest signals of code quality discipline in frontend projects.