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Frameworks & web · #vitest
Vitest hoists vi.mock calls, which can cause 'cannot access before initialization' errors. Learn how to use vi.hoisted to safely define mock data and functions.
Learn how to create, verify, and safely update Vitest snapshot tests for component regression checks.
Decide whether to run Vitest tests in jsdom or Node, compare trade‑offs, and see how to configure per‑file overrides for a mixed‑environment test suite.
Use Vitest Workspaces to run multiple project test configs under one runner in a monorepo, cutting memory overhead while keeping environments isolated.
Stop juggling multiple Vitest config files. Learn how to use Vitest Workspaces to manage Node and JSDOM environments in a single, unified test run.
Vitest catches TypeScript type errors during development, preventing runtime failures and reducing debugging time with zero-config type checking and auto-generated mocks.
Use test.each to expand a single Vitest assertion into multiple isolated test cases from a data table, with readable names and normal filtering behavior.
Learn how to define Vitest workspaces, override options per package, and run all tests in parallel while avoiding common pitfalls.
Learn how to use Vitest snapshot testing to prevent UI regressions in Vue and React components by capturing and comparing rendered DOM output.
typescript