How to highlight search results in React-Native FlatList?

Question

I'm newbie in React-native. I need to highlight the search results in my FlatList while I'm typing in search bar. There are 2 componenrs: react-native-highlight-words and react-native-text-highlight , But I cant figure out how to make use of them! here is my code:

import React, { Component } from 'react';
import {StyleSheet, Text, View, FlatList, TouchableOpacity } from 'react-native';
import { List, ListItem, SearchBar } from 'react-native-elements';
import DropdownMenu from 'react-native-dropdown-menu';
import {Header, Left, Right, Icon} from 'native-base'

var SQLite = require('react-native-sqlite-storage')
var db = SQLite.openDatabase({name: 'test.sqlite', createFromLocation: '~dictionary.sqlite'})
var data = [["English", "Arabic", "Persian"]];

export default class App extends Component {
  constructor(props) {
    super(props)
    this.state = {record: [], arrayholder : [], query:''};
    db.transaction((tx) => {
      tx.executeSql('SELECT * FROM tblWord', [], (tx, results) => {
          let row = results.rows.item();
          arrayholder = results.rows.raw()
          record = results.rows.raw()
          this.setState({arrayholder: arrayholder})
          this.setState({ record: record })
          }});});  
      }

  searchFilterFunction = text => {
    var newData = this.state.arrayholder;
    newData = this.state.arrayholder.filter(item => {
      const itemData = item.word_english.toLowerCase()
      const textData = text.toLowerCase()
      return itemData.indexOf(textData) > -1 });
    this.setState({query: text,record: newData });
  };


  render() {
    return (
      <View style = {styles.container}>
        <Header style={styles.headerStyle}>
            ...
        </Header>
        <View style={styles.menuView}>
          <DropdownMenu
            bgColor={"#B38687"}
            activityTintColor={'green'}
            titleStyle={{color: '#333333'}} 
            handler={(selection, row) => this.setState({text4: data[selection][row]})}
            data={data}
            >
          </DropdownMenu>
        </View >
        <View >
          <View style={styles.searchBarView}>
            <SearchBar
              placeholder="Search"
              lightTheme
              value = {this.state.query}
              onChangeText={text => this.searchFilterFunction(text)}
              autoCorrect={false}
              inputStyle={{backgroundColor: 'white'}}
              containerStyle={{backgroundColor: 'white', borderWidth: 1, borderColor:'#B38687', }}
              />
          </View>

          <View style={styles.flatListVew}>
            <List containerStyle={{ flexDirection: 'column-reverse', borderTopWidth: 0, borderBottomWidth: 0 }} >
              <FlatList 
                data={this.state.record} 
                keyExtractor={((item, index) => "itemNo-" + index)}
                renderItem={({item}) => (
                  <ListItem
                    roundAvatar
                    onPress={() => {this.props.navigation.navigate('Screen2', {data: (item.word_english +'\n' + item.word_arabic)} ); }}
                    title={item.word_english}
                    containerStyle={{ borderBottomWidth: 0 }}
                  /> )}
                />
              </List>
            </View>
          </View>
       </View>);}
          }

const styles = StyleSheet.create({
 ...

I want the results to look like this:

Any help would be greatly appreciated.

Answer 1

You can pass text or custom view to ListItem component as props for title. I am using React Native Highlight Words to highlight text as you stated.

add React Native Highlight Words by add the below line:

import Highlighter from 'react-native-highlight-words';

Update code for ListItem component for desired result:

<ListItem
    roundAvatar
    onPress={() => {this.props.navigation.navigate('Screen2', {data: (item.word_english +'\n' + item.word_arabic)} ); }}
    title={
      <Highlighter
          highlightStyle={{backgroundColor: 'yellow'}}
          searchWords={[this.state.query]}
          textToHighlight={item.word_english}
      />}
    containerStyle={{ borderBottomWidth: 0 }}
/>