[英]redux hooks for functional component
https://codesandbox.io/s/boring-wu-btlre
function useHackerNews(props) {
const hackerNews = useSelector(state.channel);
const dispatch = useDispatch();
return (
<button
onClick={() => {
getPosts(channel);
getAlert();
}}
className="btn btn-primary btn-lg btn-block"
>
Get top news
</button>
);
}
基本上,您使用“ useSelector”转换“ mapStateToProps”
所以这:
const mapStateToProps = state => ({ channel: state.channel });
变为:
const channel = useSelector(state => state.channel);
您的“ mapDispatchToProps”将使用“ useDispatch”进行转换
因此,您可以转换:
const mapDispatchToProps = { getPosts: fetchPosts, getAlert: displayAlert };
至:
const getPosts = () => useDispatch(fetchPosts());
const getAlert = () => useDispatch(displayAlert());
希望有道理!
useSelector
接受一个以redux存储状态为参数的函数,使用存储状态返回所需数据
const hackerNews = useSelector(state => state.channel);
这是更新的codeandbox: https ://codesandbox.io/s/jolly-faraday-9eyk5
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