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Awesome Open Source

react-native-autocomplete-dropdown

Dropdown Item picker with search and autocomplete (typeahead) functionality for react native

license npm npm

Demo

Run expo snack demo @onmotion/react-native-autocomplete-dropdown

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Installation

Run: npm install --save react-native-autocomplete-dropdown or yarn add react-native-autocomplete-dropdown

Post-install Steps

Make sure react-native-vector-icons is installed. Follow the guides https://awesomeopensource.com/project/oblador/react-native-vector-icons

yarn add react-native-vector-icons

iOS

Run: npx pod-install for install react-native-vector-icons dependency (if not installed yet).

Android

Follow the guides from https://awesomeopensource.com/project/oblador/react-native-vector-icons#android for install react-native-vector-icons dependency (if not installed yet).

Usage

import the package

import { AutocompleteDropdown } from 'react-native-autocomplete-dropdown';

Dataset item format

dataSet property must be an array of objects or null. Object required keys are:

{
    id: 'some uniq string id',
    title: 'list item title'
}

Example with local Dataset

const [selectedItem, setSelectedItem] = useState(null);

<AutocompleteDropdown
  clearOnFocus={false}
  closeOnBlur={true}
  closeOnSubmit={false}
  initialValue={{ id: '2' }} // or just '2'
  onSelectItem={setSelectedItem}
  dataSet={[
    { id: '1', title: 'Alpha' },
    { id: '2', title: 'Beta' },
    { id: '3', title: 'Gamma' },
  ]}
/>;

Example with remote requested Dataset

import React, { memo, useCallback, useRef, useState } from 'react'
import { Button, Dimensions, Text, View, Platform } from 'react-native'
import { AutocompleteDropdown } from 'react-native-autocomplete-dropdown'

import Feather from 'react-native-vector-icons/Feather'
Feather.loadFont()

export const RemoteDataSetExample2 = memo(() => {
  const [loading, setLoading] = useState(false)
  const [suggestionsList, setSuggestionsList] = useState(null)
  const [selectedItem, setSelectedItem] = useState(null)
  const dropdownController = useRef(null)

  const searchRef = useRef(null)

  const getSuggestions = useCallback(async q => {
    const filterToken = q.toLowerCase()
    console.log('getSuggestions', q)
    if (typeof q !== 'string' || q.length < 3) {
      setSuggestionsList(null)
      return
    }
    setLoading(true)
    const response = await fetch('https://jsonplaceholder.typicode.com/posts')
    const items = await response.json()
    const suggestions = items
      .filter(item => item.title.toLowerCase().includes(filterToken))
      .map(item => ({
        id: item.id,
        title: item.title,
      }))
    setSuggestionsList(suggestions)
    setLoading(false)
  }, [])

  const onClearPress = useCallback(() => {
    setSuggestionsList(null)
  }, [])

  const onOpenSuggestionsList = useCallback(isOpened => {}, [])

  return (
    <>
      <View
        style={[
          { flex: 1, flexDirection: 'row', alignItems: 'center' },
          Platform.select({ ios: { zIndex: 1 } }),
        ]}>
        <AutocompleteDropdown
          ref={searchRef}
          controller={controller => {
            dropdownController.current = controller
          }}
          // initialValue={'1'}
          direction={Platform.select({ ios: 'down' })}
          dataSet={suggestionsList}
          onChangeText={getSuggestions}
          onSelectItem={item => {
            item && setSelectedItem(item.id)
          }}
          debounce={600}
          suggestionsListMaxHeight={Dimensions.get('window').height * 0.4}
          onClear={onClearPress}
          //  onSubmit={(e) => onSubmitSearch(e.nativeEvent.text)}
          onOpenSuggestionsList={onOpenSuggestionsList}
          loading={loading}
          useFilter={false} // set false to prevent rerender twice
          textInputProps={{
            placeholder: 'Type 3+ letters (dolo...)',
            autoCorrect: false,
            autoCapitalize: 'none',
            style: {
              borderRadius: 25,
              backgroundColor: '#383b42',
              color: '#fff',
              paddingLeft: 18,
            },
          }}
          rightButtonsContainerStyle={{
            right: 8,
            height: 30,

            alignSelf: 'center',
          }}
          inputContainerStyle={{
            backgroundColor: '#383b42',
            borderRadius: 25,
          }}
          suggestionsListContainerStyle={{
            backgroundColor: '#383b42',
          }}
          containerStyle={{ flexGrow: 1, flexShrink: 1 }}
          renderItem={(item, text) => <Text style={{ color: '#fff', padding: 15 }}>{item.title}</Text>}
          ChevronIconComponent={<Feather name="chevron-down" size={20} color="#fff" />}
          ClearIconComponent={<Feather name="x-circle" size={18} color="#fff" />}
          inputHeight={50}
          showChevron={false}
          closeOnBlur={false}
          //  showClear={false}
        />
        <View style={{ width: 10 }} />
        <Button style={{ flexGrow: 0 }} title="Toggle" onPress={() => dropdownController.current.toggle()} />
      </View>
      <Text style={{ color: '#668', fontSize: 13 }}>Selected item id: {JSON.stringify(selectedItem)}</Text>
    </>
  )
})

More examples see at https://github.com/onmotion/react-native-autocomplete-dropdown/tree/main/example

Run

cd example
yarn install
yarn add react-native-vector-icons
npx pod-install
npm run ios

Options

Option Description Type Default
dataSet set of list items array null
initialValue string (id) or object that contain id string | object null
loading loading state bool false
useFilter whether use local filter by dataSet (useful set to false for remote filtering to prevent rerender twice) bool true
showClear show clear button bool true
showChevron show chevron (open/close) button bool true
closeOnBlur whether to close dropdown on blur bool false
closeOnSubmit whether to close dropdown on submit bool false
clearOnFocus whether to clear typed text on focus bool true
debounce wait ms before call onChangeText number 0
suggestionsListMaxHeight max height of dropdown number 200
direction "up" or "down" string down + auto calculate
position "relative" or "absolute" string relative
bottomOffset for calculate dropdown direction (e.g. tabbar) number 0
onChangeText event textInput onChangeText function
onSelectItem event onSelectItem function
onOpenSuggestionsList event onOpenSuggestionsList function
onChevronPress event onChevronPress function
onClear event on clear button press function
onSubmit event on submit KB button press function
onBlur event fired on text input blur function
onFocus event on focus text input function
renderItem JSX for render item (item, searchText) => JSX | null if return null then the element will not be displayed function item.title
controller return reference to module controller with methods close, open, toggle, clear, setInputText, setItem function
containerStyle ViewStyle
rightButtonsContainerStyle ViewStyle
suggestionsListContainerStyle ViewStyle
suggestionsListTextStyle TextStyle styles of suggestions list text items
ChevronIconComponent React.Component Feather chevron icon
ClearIconComponent React.Component Feather x icon
ScrollViewComponent removed in 2.0.0 based on FlatList React.Component name ScrollView that provide suggestions content
EmptyResultComponent replace the default `` Component on empty result React.Component
InputComponent input element component React.ComponentType TextInput
emptyResultText replace the default "Nothing found" text on empty result string "Nothing found"
textInputProps text input props TextInputProps
flatListProps props for \ component FlatListProps\

Troubleshooting

zIndex hell on iOS

As decribed here https://docs.expo.dev/ui-programming/z-index/ on iOS for absolute positioned items we must respect the zIndex of the element parent.

So for example if you do smth like

          <View style={[styles.section]}>
            <Text style={styles.sectionTitle}>First</Text>
            <AutocompleteDropdown
              dataSet={[
                { id: '1', title: 'Alpha' },
                { id: '2', title: 'Beta' },
                { id: '3', title: 'Gamma' },
              ]}
            />
          </View>
          <View style={[styles.section]}>
            <Text style={styles.sectionTitle}>Second</Text>
            <AutocompleteDropdown
              dataSet={[
                { id: '1', title: 'Alpha' },
                { id: '2', title: 'Beta' },
                { id: '3', title: 'Gamma' },
              ]}
            />
          </View>

you would see Screenshot 2022-04-24 at 20 59 38

But if it change with calculated zIndex:

          <View
            style={[styles.section, Platform.select({ ios: { zIndex: 10 } })]}>
            <Text style={styles.sectionTitle}>First</Text>
            <AutocompleteDropdown
              dataSet={[
                { id: '1', title: 'Alpha' },
                { id: '2', title: 'Beta' },
                { id: '3', title: 'Gamma' },
              ]}
            />
          </View>
          <View
            style={[styles.section, Platform.select({ ios: { zIndex: 9 } })]}>
            <Text style={styles.sectionTitle}>Second</Text>
            <AutocompleteDropdown
              dataSet={[
                { id: '1', title: 'Alpha' },
                { id: '2', title: 'Beta' },
                { id: '3', title: 'Gamma' },
              ]}
            />
          </View>

it will be rendered as expected Screenshot 2022-04-24 at 21 03 16

And the same, if you want render dropdown list to up direction, you should switch zIndexes respectively

More info about this behaviour: https://docs.expo.dev/ui-programming/z-index/

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