API Reference > imodeljs-frontend > QuantityFormatting > isTextSelectFormatPropEditorSpec isTextSelectFormatPropEditorSpec Function Beta TextSelectFormatPropEditorSpec type guard. isTextSelectFormatPropEditorSpec(item: CustomFormatPropEditorSpec): item is TextSelectFormatPropEditorSpec Parameter Type Description item CustomFormatPropEditorSpec Returns - item is TextSelectFormatPropEditorSpec Defined in core/frontend/src/quantity-formatting/QuantityFormatter.ts Line 108 Last Updated: 29 November, 2022