browser.trace

• Type: 'on' | 'off' | 'on-first-retry' | 'on-all-retries' | 'retain-on-failure' | object
• CLI: --browser.trace=on, --browser.trace=retain-on-failure
• Default: 'off'

Capture a trace of your browser test runs. You can preview traces with Playwright Trace Viewer.

This options supports the following values:

• 'on' - capture trace for all tests. (not recommended as it's performance heavy)
• 'off' - do not capture traces.
• 'on-first-retry' - capture trace only when retrying the test for the first time.
• 'on-all-retries' - capture trace on every retry of the test.
• 'retain-on-failure' - capture trace only for tests that fail. This will automatically delete traces for tests that pass.
• object - an object with the following shape:

interface TraceOptions {
  mode: 'on' | 'off' | 'on-first-retry' | 'on-all-retries' | 'retain-on-failure'
  /**
   * The directory where all traces will be stored. By default, Vitest
   * stores all traces in `__traces__` folder close to the test file.
   */
  tracesDir?: string
  /**
   * Whether to capture screenshots during tracing. Screenshots are used to build a timeline preview.
   * @default true
   */
  screenshots?: boolean
  /**
   * If this option is true tracing will
   * - capture DOM snapshot on every action
   * - record network activity
   * @default true
   */
  snapshots?: boolean
}

::: danger WARNING This option is supported only by the playwright provider. :::