我有几个按钮作为路径。每次改变路线时，我都想确保激活的按钮发生了变化。
有没有办法在react路由器v4中监听路由变化?
当前回答
对于react Hooks，我使用useEffect
import React from 'react'
const history = useHistory()
const queryString = require('query-string')
const parsed = queryString.parse(location.search)
const [search, setSearch] = useState(parsed.search ? parsed.search : '')
useEffect(() => {
const parsedSearch = parsed.search ? parsed.search : ''
if (parsedSearch !== search) {
// do some action! The route Changed!
}
}, [location.search])
在这个例子中，当路由改变时，我向上滚动:
import React from 'react'
import { useLocation } from 'react-router-dom'
const ScrollToTop = () => {
const location = useLocation()
React.useEffect(() => {
window.scrollTo(0, 0)
}, [location.key])
return null
}
export default ScrollToTop
其他回答
import { useHistory } from 'react-router-dom';
const Scroll = () => {
const history = useHistory();
useEffect(() => {
window.scrollTo(0, 0);
}, [history.location.pathname]);
return null;
}
对于React路由器v6和React钩子， 你需要使用useLocation而不是useHistory，因为它已被弃用
import { useLocation } from 'react-router-dom'
import { useEffect } from 'react'
export default function Component() {
const history = useLocation();
useEffect(() => {
console.log('> Router', history.pathname)
}, [history.pathname]);
}
我使用withRouter来获取位置道具。当组件因为一个新的路由而更新时，我检查值是否发生了变化:
@withRouter
class App extends React.Component {
static propTypes = {
location: React.PropTypes.object.isRequired
}
// ...
componentDidUpdate(prevProps) {
if (this.props.location !== prevProps.location) {
this.onRouteChanged();
}
}
onRouteChanged() {
console.log("ROUTE CHANGED");
}
// ...
render(){
return <Switch>
<Route path="/" exact component={HomePage} />
<Route path="/checkout" component={CheckoutPage} />
<Route path="/success" component={SuccessPage} />
// ...
<Route component={NotFound} />
</Switch>
}
}
对于react Hooks，我使用useEffect
import React from 'react'
const history = useHistory()
const queryString = require('query-string')
const parsed = queryString.parse(location.search)
const [search, setSearch] = useState(parsed.search ? parsed.search : '')
useEffect(() => {
const parsedSearch = parsed.search ? parsed.search : ''
if (parsedSearch !== search) {
// do some action! The route Changed!
}
}, [location.search])
在这个例子中，当路由改变时，我向上滚动:
import React from 'react'
import { useLocation } from 'react-router-dom'
const ScrollToTop = () => {
const location = useLocation()
React.useEffect(() => {
window.scrollTo(0, 0)
}, [location.key])
return null
}
export default ScrollToTop
用钩子:
import { useEffect } from 'react'
import { withRouter } from 'react-router-dom'
import { history as historyShape } from 'react-router-prop-types'
const DebugHistory = ({ history }) => {
useEffect(() => {
console.log('> Router', history.action, history.location)
}, [history.location.key])
return null
}
DebugHistory.propTypes = { history: historyShape }
export default withRouter(DebugHistory)
导入并呈现为<DebugHistory>组件
