我有一个问题,当导航到另一个页面,它的位置将保持像之前的页面。所以它不会自动滚动到顶部。 我也试过使用window。onChange路由器上的scrollTo(0,0)。我还使用了scrollBehavior来修复这个问题,但它没有工作。对此有什么建议吗?
当前回答
我在我的项目中使用了Typescript。这招对我很管用:
// ScrollToTop.tsx
import {useEffect, useRef} from 'react'
import {withRouter} from 'react-router-dom'
const ScrollToTopComponent = () => {
const mounted = useRef(false)
useEffect(() => {
if (!mounted.current) {
//componentDidMount
mounted.current = true
} else {
//componentDidUpdate
window.scrollTo(0, 0)
}
})
return null
}
export const ScrollToTop = withRouter(ScrollToTopComponent)
// usage in App.tsx
export default function App() {
return (
<Router>
<ScrollToTop />
<OtherRoutes />
</Router>
)
}
其他回答
2021年(React 16) -基于@Atombit的评论
下方卷轴向上,还保留了历史卷轴位置。
function ScrollToTop() {
const history = useHistory()
useEffect(() => {
const unlisten = history.listen((location, action) => {
if (action !== 'POP') {
window.scrollTo(0, 0)
}
})
return () => unlisten()
}, [])
return (null)
}
用法:
<Router>
<ScrollToTop />
<Switch>
<Route path="/" exact component={Home} />
</Switch>
</Router>
在主组件中。
只需添加这个React钩子(如果你没有使用React类):
const oldPage = useRef(pathname)
useEffect(() => {
if (pathname !== oldPage.current) {
try {
window.scroll({
top: 0,
left: 0,
behavior: 'smooth'
})
} catch (error) {
// for older browser
window.scrollTo(0, 0)
}
oldPage.current = pathname
}
}, [pathname])
对于react-router v4,这里有一个实现滚动恢复的create-react-app: http://router-scroll-top.surge.sh/。
要实现这一点,你可以创建装饰Route组件和利用生命周期方法:
import React, { Component } from 'react';
import { Route, withRouter } from 'react-router-dom';
class ScrollToTopRoute extends Component {
componentDidUpdate(prevProps) {
if (this.props.path === this.props.location.pathname && this.props.location.pathname !== prevProps.location.pathname) {
window.scrollTo(0, 0)
}
}
render() {
const { component: Component, ...rest } = this.props;
return <Route {...rest} render={props => (<Component {...props} />)} />;
}
}
export default withRouter(ScrollToTopRoute);
在componentDidUpdate上,我们可以检查位置路径名何时发生变化,并将其与路径道具匹配,如果满足,则恢复窗口滚动。
这个方法最酷的地方在于,我们可以有恢复滚动的路由和不恢复滚动的路由。
下面是一个App.js的例子,告诉你如何使用上面的方法:
import React, { Component } from 'react';
import { BrowserRouter as Router, Route, Link } from 'react-router-dom';
import Lorem from 'react-lorem-component';
import ScrollToTopRoute from './ScrollToTopRoute';
import './App.css';
const Home = () => (
<div className="App-page">
<h2>Home</h2>
<Lorem count={12} seed={12} />
</div>
);
const About = () => (
<div className="App-page">
<h2>About</h2>
<Lorem count={30} seed={4} />
</div>
);
const AnotherPage = () => (
<div className="App-page">
<h2>This is just Another Page</h2>
<Lorem count={12} seed={45} />
</div>
);
class App extends Component {
render() {
return (
<Router>
<div className="App">
<div className="App-header">
<ul className="App-nav">
<li><Link to="/">Home</Link></li>
<li><Link to="/about">About</Link></li>
<li><Link to="/another-page">Another Page</Link></li>
</ul>
</div>
<Route exact path="/" component={Home} />
<ScrollToTopRoute path="/about" component={About} />
<ScrollToTopRoute path="/another-page" component={AnotherPage} />
</div>
</Router>
);
}
}
export default App;
从上面的代码中,有趣的是,只有在导航到/关于或/另一个页面时,才会执行滚动到顶部的操作。然而,当进行/没有滚动恢复将发生。
整个代码库可以在这里找到:https://github.com/rizedr/react-router-scroll-top
在router.js中,只需在router对象中添加这个函数。这个就行了。
scrollBehavior() {
document.getElementById('app').scrollIntoView();
},
像这样,
* * Routes.js * *
import vue from 'blah!'
import Router from 'blah!'
let router = new Router({
mode: 'history',
base: process.env.BASE_URL,
scrollBehavior() {
document.getElementById('app').scrollIntoView();
},
routes: [
{ url: "Solar System" },
{ url: "Milky Way" },
{ url: "Galaxy" },
]
});
我写了一个叫withScrollToTop的高阶组件。这个HOC有两个标志:
onComponentWillMount -导航时是否滚动到顶部(componentWillMount) onComponentDidUpdate—是否在更新时滚动到顶部(componentDidUpdate)。该标志在组件没有卸载但发生导航事件的情况下是必要的,例如,从/users/1到/users/2。
// @flow
import type { Location } from 'react-router-dom';
import type { ComponentType } from 'react';
import React, { Component } from 'react';
import { withRouter } from 'react-router-dom';
type Props = {
location: Location,
};
type Options = {
onComponentWillMount?: boolean,
onComponentDidUpdate?: boolean,
};
const defaultOptions: Options = {
onComponentWillMount: true,
onComponentDidUpdate: true,
};
function scrollToTop() {
window.scrollTo(0, 0);
}
const withScrollToTop = (WrappedComponent: ComponentType, options: Options = defaultOptions) => {
return class withScrollToTopComponent extends Component<Props> {
props: Props;
componentWillMount() {
if (options.onComponentWillMount) {
scrollToTop();
}
}
componentDidUpdate(prevProps: Props) {
if (options.onComponentDidUpdate &&
this.props.location.pathname !== prevProps.location.pathname) {
scrollToTop();
}
}
render() {
return <WrappedComponent {...this.props} />;
}
};
};
export default (WrappedComponent: ComponentType, options?: Options) => {
return withRouter(withScrollToTop(WrappedComponent, options));
};
使用它:
import withScrollToTop from './withScrollToTop';
function MyComponent() { ... }
export default withScrollToTop(MyComponent);