--- sidebar_label: CSSCoverage.start --- # CSSCoverage.start() method **Signature:** ```typescript class CSSCoverage { start(options?: {resetOnNavigation?: boolean}): Promise<void>; } ``` ## Parameters | Parameter | Type | Description | | --------- | -------------------------------- | ----------------- | | options | { resetOnNavigation?: boolean; } | <i>(Optional)</i> | **Returns:** Promise<void>