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title browser.instances | Config
outline deep

browser.instances

  • 类型: BrowserConfig
  • 默认值: []

Defines multiple browser setups. Every config has to have at least a browser field.

You can specify most of the project options (not marked with a icon) and some of the browser options like browser.testerHtmlPath.

::: warning Every browser config inherits options from the root config:

export default defineConfig({
  test: {
    setupFile: ['./root-setup-file.js'],
    browser: {
      enabled: true,
      testerHtmlPath: './custom-path.html',
      instances: [
        {
          // will have both setup files: "root" and "browser"
          setupFile: ['./browser-setup-file.js'],
          // implicitly has "testerHtmlPath" from the root config // [!code warning]
          // testerHtmlPath: './custom-path.html', // [!code warning]
        },
      ],
    },
  },
})

For more examples, refer to the "Multiple Setups" guide. :::

List of available browser options:

Under the hood, Vitest transforms these instances into separate test projects sharing a single Vite server for better caching performance.