[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [setSymmetricDifference](./rc-js-util.setsymmetricdifference.md) ## setSymmetricDifference() function Returns those items in A not in B, and those items in B not in A. **Signature:** ```typescript export declare function setSymmetricDifference(a: ReadonlySet, b: ReadonlySet): TItem[]; ``` ## Parameters

Parameter	Type	Description
a	ReadonlySet<TItem>
b	ReadonlySet<TItem>

**Returns:** TItem\[\] ## Remarks See [setSymmetricDifference()](./rc-js-util.setsymmetricdifference.md).