[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [filter](./x-components.filter.md) ## filter() function Creates a [Wire](./x-components.wire.md) that is only executed whenever the condition in the filterFn is true. **Signature:** ```typescript export declare function filter(wire: Wire, filterFn: (parameters: WireParams) => boolean): Wire; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | wire | [Wire](./x-components.wire.md)<Payload> | The wire to filter. | | filterFn | (parameters: [WireParams](./x-components.wireparams.md)<Payload>) => boolean | A function which must return a boolean and that will be executed every time the wire is called. | **Returns:** [Wire](./x-components.wire.md)<Payload> The Wire function filter.