--- sidebar_label: Coverage.startCSSCoverage --- # Coverage.startCSSCoverage() method **Signature:** ```typescript class Coverage { startCSSCoverage(options?: CSSCoverageOptions): Promise<void>; } ``` ## Parameters | Parameter | Type | Description | | --------- | ------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- | | options | [CSSCoverageOptions](./puppeteer.csscoverageoptions.md) | <i>(Optional)</i> Set of configurable options for coverage, defaults to <code>resetOnNavigation : true</code> | **Returns:** Promise<void> Promise that resolves when coverage is started.