🚨 Breaking Changes

• Transform mode affects only test files, not regular files  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3491 (9608b)
  • transformMode is now moved to server.transformMode. This option is highly discouraged to use. If you need to change the transform mode, use the new option testTransformMode instead to control the mode based on the running test, not the current file path. By default, tests with jsdom or happy-dom use web transform mode, and tests using node or edge environment use ssr mode. If you have a custom environment, it should provide transformMode property.
• Custom environment now should be processed before Vitest can consume it. It means that you cannot specify a path to a TS file or use import paths that should be processed by Vite.
• Disable coverage.reportOnFailure by default  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3615 (0c6f6)
• Remove @vitest/coverage-c8 package  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3614 (a90d6)
  • @vitest/coverage-c8 is no longer supported. Please, use @vitest/coverage-v8 instead.
• Support running tests using VM context  -  by @sheremet-va and @dammy001 in https://github.com/vitest-dev/vitest/issues/3203 (b0929)
  • To address speed issues in some applications, Vitest now provides experimentalVmThreads pool to run your tests using VM Sandboxes environment. Make sure you understand all pitfalls of this pool before opening an issue.
• Introduce server option  -  by @fenghan34 and @sheremet-va in https://github.com/vitest-dev/vitest/issues/3725 (dc4fa)
  • Most of deps. options are now moved to server.deps with a deprecation warning. Please, consider using deps.optimizer instead of deps.inline/deps.external. Ideally, we would like to move away from using server.deps.inline altogether.
• vite-node: Make CLI arguments parsing behavior consistent with node/tsx/ts-node  -  by @rxliuli in https://github.com/vitest-dev/vitest/issues/3574 (1cd4e)
  • You now have to provide CLI arguments before the entry point. For example, instead of vite-node index.ts --watch, you now have to do vite-node --watch index.ts.
• Add preact example, remove optimizer experimental status, enable by default  -  by @sheremet-va and @eryue0220 in https://github.com/vitest-dev/vitest/issues/3854 (4b946)
  • deps.optimizer is now enabled by default. This means that Vitest will bundle specified dependencies before running your tests. This field inherits options from optimizeDeps and ssr.optimizeDeps which are populated by other plugins (like, Svelte).

   🚀 Features

• Support describe.sequential  -  by @fenghan34 and @dammy001 in https://github.com/vitest-dev/vitest/issues/3771 (86934)
• Support config junit reporter className with env  -  by @InfiniteXyy in https://github.com/vitest-dev/vitest/issues/3808 (e8bc4)
• Running vitest with --related --watch reruns non-affected tests if they were changed during a run  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3844 (c9aea)

   🐞 Bug Fixes

• Isolate workers between envs and workspaces  -  by @AriPerkkio (ed4e0)
• Modify condition  -  by @btea (a78e6)
• Module Graph view is blocking the Console view  -  by @g4rry420 (3b5f9)
• Port the latest defineConfig type from vite  -  by @sodatea in https://github.com/vitest-dev/vitest/issues/3804 (9c8e3)
• Don't overwrite Node.js URL global  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3828 (cdab4)
• ForceRerunTriggers correctly triggers a rerun  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3829 (17988)
• browser:
  • Don't inline magic-string and estree-walker  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3726 (ee937)
  • Multi-suite coverage  -  by @elby22 in https://github.com/vitest-dev/vitest/issues/3806 (5de9a)
• core:
  • DataView comparison does not work in toStrictEqual  -  by @Dunqing (52aef)
• coverage:
  • V8 provider to pick source maps without url query params  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3784 (280e6)
  • Update istanbul-lib-instrument to v6 to fix vulnerable dependency  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3814 (f3bd9)
  • Exclude vite virtual modules by default  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3794 (3c851)
• node:
  • Guard error info  -  by @btea (88b39)
• vite-node:
  • Always treat node_modules as modulesDirectory  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3830 (51ab8)
  • Normalize drive letter to keep the same reference to a module  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3836 (45521)
  • Correctly resolve hmr filepath  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3834 (711a6)
• watch:
  • Clear screen on all terminals  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3661 (8bd26)

   🏎 Performance

• Deprecate deps.registerNodeLoader  -  by @sheremet-va (7f45b)
  • This option was introduced to support aliasing inside external packages. Please, use deps.optimizer.web instead. If you test Node.js applications, consider adding external packages to server.deps.inline.

    View changes on GitHub