了解 renderItem 属性中的解构<flatlist />在 React Native 中

Question

I came across the following React Native code online:

import React, { useState } from 'react';
import { StyleSheet, Text, View, FlatList } from 'react-native';

export default function App() {
  const [people, setPeople] = useState([
    { name: 'shaun', id: '1' },
    { name: 'yoshi', id: '2' },
    { name: 'mario', id: '3' },
    { name: 'luigi', id: '4' },
    { name: 'peach', id: '5' },
    { name: 'toad', id: '6' },
    { name: 'bowser', id: '7' },
  ]);

  return (
    <View style={styles.container}>

      <FlatList 
        numColumns={2}
        keyExtractor={(item) => item.id} 
        data={people} 
        renderItem={({item}) => ( 
          <Text style={styles.item}>{item.name}</Text>
        )}
      />

    </View>
  );
}

I do not quite following the snippet related to the renderItem property. why are we using the destructuring syntax {item} . Also this is an object destructuring syntax (using curly braces), but in object destructuring we use keys as variable names. So I am afraid I am completley at a loss to understand the snippet below.

<FlatList 
        numColumns={2}
        keyExtractor={(item) => item.id} 
        data={people} 
        renderItem={({item}) => ( 
          <Text style={styles.item}>{item.name}</Text>
        )}

Any guidance would be appreciated.

Answer 1

this...

renderItem={({item}) => ( 
  <Text style={styles.item}>{item.name}</Text>
)}

actually mean....

renderItem={(props) => ( 
  <Text style={styles.item}>{props.item.name}</Text>
)}

This technique is called object destruction check out for more info - https://medium.com/podiihq/destructuring-objects-in-javascript-4de5a3b0e4cb