> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/salesforce-lightning/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/salesforce-lightning/salesforce-lightning-b2b-commerce-app-2.1/extend-the-salesforce-lightning-app/customizing-the-lightning-web-components/components/dr-util-component.md).

# DR util component

### Using with LWR

The `drb2b_drUtil_LWR` is a component with no UI. Use this component to clean up old cart data when the Checkout page reloads. It also refreshes the Digital River components whenever tax information is calculated.

### Using with Aura

The `drb2b_drUtil` is a component with no UI. Use this component to reload the `drb2b_addressDetails`, `drb2b_checkoutSummary`, and `drb2b_drCompliance` components and get the latest values. Loading this component triggers an event (`CALCULATE_TAX`) to reload the `drb2b_addressDetails`, `drb2b_checkoutSummary`, and `drb2b_drCompliance` components.


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