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[英]React: Why can't I pass data from one functional component to another functional component?
[英]Save and pass data returned from a promise to functional another component in react
const fetchMusic= () => {
return new Promise((resolve) =>
setTimeout(() => {
const music = musicList.sort(() => 0.5 - Math.random()).slice(0, 4);
resolve({ data: music});
}, 300)
);
};
export default fetchMusic;
const getRandomMusic = () => {
return fetchMusic().then((result) => result.data);
};
const Button = (props) => {
return (
<div>
<Button {...props} onClick={getRandomMusic.bind(this)} />
<SomeComponent />
<p>Some text here</p>
</div>
);
};
musicList 是一組具有名稱和年份的對象。
const musicList = [{ 名稱:'abc',年份:1990
},{名稱:'xyz',年份:1989'}]
我想保存從 getRandomMusic function 返回的數據並將其傳遞給 SomeComponent 組件。
您可以使用useState
( doc )
const Button = props => {
const [musicList, setMusicList] = React.useState([])
const getRandomMusic = () => {
fetchMusic().then(result => {
setMusicList(result.data)
})
}
return (
<div>
<Button {...props} onClick={getRandomMusic.bind(this)} />
<SomeComponent musicList={musicList} />
<p>Some text here</p>
</div>
)
}
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