on change of options how can I rerender renderButtonText and empty it's value inside dropdown?

[octocat01]

<ModalDropdown options={this.props.options} renderRow={(rowData: any) => this.renderDropDownListForDarkTheme(rowData)} isFullWidth defaultValue={this.props.defaultValue} renderButtonText={(rowData: any) => this.renderButtonText(rowData)} defaultTextStyle={styles.defaultTextStyleForDarkTheme} renderRightComponent={this.renderRightComponent} onDropdownWillShow={() => this.setState({ isOpendropdown: true })} onDropdownWillHide={() => this.setState({ isOpendropdown: false })} onSelect={(id: any, rowData: any) => this.props.onSelect(rowData)} dropdownTextStyle={styles.isFromUpskillingtextStyelforDarktheme} textStyle={[styles.isFromUpskillingtextStyelforDarktheme]} dropdownStyle={{backgroundColor: '#505050', height:this.props.options.length*45, maxHeight:140}} />