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?
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
v5.1引入了有用的钩子useLocation
https://reacttraining.com/blog/react-router-v5-1/#uselocation
import { Switch, useLocation } from 'react-router-dom'
function usePageViews() {
let location = useLocation()
useEffect(
() => {
ga.send(['pageview', location.pathname])
},
[location]
)
}
function App() {
usePageViews()
return <Switch>{/* your routes here */}</Switch>
}
其他回答
withRouter,历史。listen,和useEffect (React Hooks)一起工作得很好:
import React, { useEffect } from 'react'
import { withRouter } from 'react-router-dom'
const Component = ({ history }) => {
useEffect(() => history.listen(() => {
// do something on route change
// for my example, close a drawer
}), [])
//...
}
export default withRouter(Component)
侦听器回调将在路由更改时触发,并返回历史记录。listen是一个关闭处理程序,可以很好地与useEffect一起使用。
v5.1引入了有用的钩子useLocation
https://reacttraining.com/blog/react-router-v5-1/#uselocation
import { Switch, useLocation } from 'react-router-dom'
function usePageViews() {
let location = useLocation()
useEffect(
() => {
ga.send(['pageview', location.pathname])
},
[location]
)
}
function App() {
usePageViews()
return <Switch>{/* your routes here */}</Switch>
}
您应该使用history v4 lib。
这里的例子
history.listen((location, action) => {
console.log(`The current URL is ${location.pathname}${location.search}${location.hash}`)
console.log(`The last navigation action was ${action}`)
})
要在上面的基础上展开,您需要获取history对象。如果您正在使用BrowserRouter,您可以导入withRouter并使用高阶组件(HoC)包装您的组件,以便通过道具访问历史对象的属性和函数。
import { withRouter } from 'react-router-dom';
const myComponent = ({ history }) => {
history.listen((location, action) => {
// location is an object like window.location
console.log(action, location.pathname, location.state)
});
return <div>...</div>;
};
export default withRouter(myComponent);
唯一需要注意的是,使用throuter和大多数其他访问历史的方法似乎会污染道具,因为它们将对象解构到其中。
正如其他人所说,这已经被react路由器暴露的钩子所取代,并且它有内存泄漏。如果你在一个函数组件中注册监听器,你应该通过useEffect来做,然后在函数的返回中取消注册。
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