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[英]React Hook "useDispatch" cannot be called at the top level. React Hooks must be called in a React function component or a custom React Hook function
[英]React Hook "useState" cannot be called at the top level. React Hooks must be called in a React function component or a custom React Hook function
我的代碼:-
import React, { useState} from 'react';
import WEBINAR_LIST from './webinar_data';
const [ page, setPage ] = useState(0); //create page state
const pageData = useMemo(() => {
return WEBINAR_LIST.slice(page*5, (page*5)+5)
},[page])
const nextPage = () => setPage(prev => prev+1)
const prevPage = () => setPage(prev => prev > 0 ? prev-1 : prev)
謝謝!
換句話說,您很可能需要將 const 移動到主 function 以下。對我來說,我必須將 useState 的 const 移動到 export function App 下面。
你不能在頂層調用 React Hooks,你需要創建一個功能組件。
在此處了解有關組件的更多信息,並在此處了解有關鈎子的更多信息。
一個功能組件看起來像這樣:
import React, { useState } from 'react';
// Create your functional component:
function Example() {
// And now you can use hooks
// But only inside your functional component's
// body
const [count, setCount] = useState(0);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}
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