# LegendItemChangeCallbackParams

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The parameters for the [\`onLegendItemChange\`](https://developers.felt.com/js-sdk-api-reference/layerscontroller#onlegenditemchange) listener.

## Properties

### legendItem

> **legendItem**: `null` | [`LegendItem`](https://developers.felt.com/js-sdk-api-reference/layers/legenditem)

The new data for the legend item or null if the legend item was removed.