import {useState} from 'react';import {useCombobox, useMultipleSelection} from 'downshift';const items = ['apple','apricot','pear','orange','grape','banana'];export default function App() { const [inputValue, setInputValue] = useState('');const {getSelectedItemProps,
  getDropdownProps,
  addSelectedItem,
            removeSelectedItem,
  selectedItems} =
                        useMultipleSelection({initialSelectedItems: [items[0], items[1]]});const getFilteredItems = items => items.filter( item => selectedItems.indexOf(item)<0
                                           && item.toLowerCase().startsWith(inputValue.toLowerCase()));
    const {isOpen, getToggleButtonProps, getLabelProps, getMenuProps, getInputProps,
           getComboboxProps, highlightedIndex, getItemProps, selectItem} = useCombobox({
                 inputValue,
  items: getFilteredItems(items),
                 onStateChange: ({inputValue, type, selectedItem}) => {
                    switch (type) {
                        case useCombobox.stateChangeTypes.InputChange:
                           setInputValue(inputValue)
                        break;
  case useCombobox.stateChangeTypes.InputKeyDownEnter:
                        case useCombobox.stateChangeTypes.ItemClick:
                        case useCombobox.stateChangeTypes.InputBlur:
                            if (selectedItem) {
                               setInputValue('');
                               addSelectedItem(selectedItem);
                               selectItem(null);
                            }
                       break;
  default: break;
                    }
                 }});
    return (<div><label {...getLabelProps()}>Choose some elements:</label>
                        <div>{selectedItems.map((selectedItem, index) => (
                                    <span key={`selected-item-${index}`}
                                   {...getSelectedItemProps({selectedItem, index})}>
                             {selectedItem}
                                       <span onClick={() => removeSelectedItem(selectedItem)}>
                                           &#10005;</span></span>))}
                                 <div {...getComboboxProps()}>
                                   <input {...getInputProps(getDropdownProps(
                                                                                 {preventKeyAction: isOpen}))} />
                                   <button {...getToggleButtonProps()} aria-label={'toggle menu'}>
                                      &#8595;</button></div></div>
                        <ul {...getMenuProps()} >{isOpen &&
                                    getFilteredItems(items).map((item, index) => (
              <li
  style={highlightedIndex===index?{backgroundColor: '#bde4ff'}:{}}
                                 key={`${item}${index}`}
  {...getItemProps({item, index})}>
                 {item}
                            </li>))}
                        </ul>
  </div>);}