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Testing
Catch bugs before your users do.
Cypress
Playwright's longer-running rival for E2E testing. Still solid, particularly if your team already has Cypress test suites and tooling built up.
Jest
Still the safe default for unit testing in a lot of existing Node/React codebases. Huge ecosystem of docs and Stack Overflow answers if something breaks.
Playwright
The default pick for end-to-end browser testing now. Fast, handles multiple browsers, and its trace viewer makes debugging a flaky test much less painful.
Testing Library
Not a runner itself, but the query API (getByRole, getByText) that keeps you testing what a user actually sees instead of implementation details.
Vitest
Unit test runner that reuses your Vite config, so if your app already builds with Vite tests just run without a separate Jest config to maintain.