Vitest UI

Powered by Vite, Vitest also has a dev server under the hood when running the tests. This allows Vitest to provide a beautiful UI to view and interact with your tests. The Vitest UI is optional, so you’ll need to install it with:

npm i -D @vitest/ui

Then you can start the tests with UI by passing the --ui flag:

vitest --ui

Then you can visit the Vitest UI at <a href=“http://localhost:51204/__vitest__/“>`http://localhost:51204/__vitest__/`</a>

<img alt=“Vitest UI” img-light src=“/ui-1-light.png”> <img alt=“Vitest UI” img-dark src=“/ui-1-dark.png”>

UI can also be used as a reporter. Use 'html' reporter in your Vitest configuration to generate HTML output and preview the results of your tests:

vitest.config.ts

export default {
  test: {
    reporters: ['html']
  }
}

You can check your coverage report in Vitest UI: see Vitest UI Coverage for more details.

Attention

If you still want to see how your tests are running in real time in the terminal, don’t forget to add default reporter to reporters option: ['default', 'html'].

Astuce

To preview your HTML report, you can use the vite preview command:

npx vite preview --outDir ./html

You can configure output with outputFile config option. You need to specify .html path there. For example, ./html/index.html is the default value.