[英]How to pass location state and URL params using React-Router?
當我單擊HoverBooks
組件中的鏈接進入一個新頁面時,我可以在Book
組件中呈現book
位置 state,但是當我按下它時沒有任何反應。 我認為錯誤在於Route
:
function App() {
return (
<div className="App">
<Router>
<Switch>
<Route path="/book:/book.Key">
<Book />
</Route>
<Route path="/signin">
<Signin />
</Route>
<Route path="/">
<Header />
<Home />
</Route>
</Switch>
</Router>
</div>
)
}
export default App
import React from 'react'
import { useLocation } from 'react-router-dom'
const Book = () => {
const {
state: { book },
} = useLocation()
console.log({ book })
return (
<div key={book.key}>
<h1>{book.bookName}</h1>
</div>
)
}
export default Book
const HoverBooks = ({ ...book }) => {
const [inHoverBooks, setInHoverBooks] = React.useState(false)
return (
<>
<Link
to={{
pathName: `/book/${book.key}`,
state: {
book,
},
}}
>
<img
onMouseLeave={() => setInHoverBooks(false)}
onMouseEnter={() => setInHoverBooks(true)}
src={book.image}
key={book.key}
/>
</Link>
{inHoverBooks && (
<div className="hover__containter">
<h3>{book.bookName}</h3>
<h2>{book.by}</h2>
<h2>{book.Narreted}</h2>
<h2>{book.length}</h2>
<h2>{book.rating}</h2>
</div>
)}
</>
)
}
export default HoverBooks
下面是使用URL 參數定義路由的正確形式,例如/:someName
:
<Route path="/book/:bookKey">
<Book />
</Route>
這是為上述路線創建Link
的正確語法:
<Link
to={{
pathname: `/book/SOME_BOOK_KEY`, // replace SOME_BOOK_KEY with some value
state: {
book, // e.g. const book = { key: 'js', bookName: 'Learn JavaScript'}
},
}}
>
<img src="some_src" alt="something" />
</Link>
並且您使用Params和useLocation react-hooks 來訪問組件中的“URL 參數”和“位置狀態”:
const Book = () => {
const {
state: { book },
} = useLocation()
const { bookKey } = useParams();
console.log(book, bookKey)
// prints "book" object (from location state) and "bookKey" (from URL params)
return (
<div key={book.key}>
<h1>{book.bookName}</h1>
</div>
)
}
我建議您將typescript添加到您的 ReactJS 應用程序中。 它通過執行“靜態類型檢查”幫助您及早發現錯誤。
使用反應路由器,您需要像這樣將要渲染的組件傳遞給Route
const ComponentA = (props) => {...}
<Route path="/component-a" component={ComponentA} />
這里是如何鏈接到組件 a
<Link to="/component-a" >Go to component A</Link>
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