native-base/src/components/composites/Typeahead/useTypeahead/utils.ts

Essential cross-platform UI components for React Native

export const dropdownDefaultStateValues = {
  highlightedIndex: -1,
  isOpen: false,
  selectedItem: null,
  inputValue: '',
};

export function capitalizeString(string: string) {
  return `${string.slice(0, 1).toUpperCase()}${string.slice(1)}`;
}

export function getDefaultValue(
  props: any,
  propKey: any,
  defaultStateValues = dropdownDefaultStateValues
) {
  const defaultPropKey = `default${capitalizeString(propKey)}`;

  if (defaultPropKey in props) {
    return props[defaultPropKey];
  }
  //@ts-ignore
  return defaultStateValues[propKey];
}