对于react-router-dom V5，滚动到顶部

    import React, { useEffect } from 'react';
import {
    BrowserRouter as Router,
    Switch,
    Route,
    Link,
    useLocation,
    withRouter
} from 'react-router-dom'
function _ScrollToTop(props) {
    const { pathname } = useLocation();
    useEffect(() => {
        window.scrollTo(0, 0);
    }, [pathname]);
    return props.children
}
const ScrollToTop = withRouter(_ScrollToTop)
function App() {
    return (
        <div>
            <Router>
                <ScrollToTop>
                    <Header />
                     <Content />
                    <Footer />
                </ScrollToTop>
            </Router>
        </div>
    )
}

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);

render() {
    window.scrollTo(0, 0)
    ...
}

在道具没有改变和componentDidUpdate()没有触发的情况下，这是一个简单的解决方案。

对于'REACT-ROUTER-DOM v6及以上'

我通过创建一个包装器函数并将其包装在所有路由上解决了以下问题。

请遵循以下步骤:

1:需要导入以下内容:

import {Routes, Route, BrowserRouter as Router, useLocation} from 'react-router-dom';
import {useLayoutEffect} from 'react';

2:在"App"函数上面写一个包装器函数:

const Wrapper = ({children}) => {
  const location = useLocation();
  useLayoutEffect(() => {
    document.documentElement.scrollTo(0, 0);
  }, [location.pathname]);
  return children
} 

3:现在在包装器函数中包装你的路由:

<BrowserRouter>
  <Wrapper>
    <Navbar />
      <Routes>
        <Route exact path="/" element={<Home/>} />
        <Route path="/Products" element={<Products/>} />
        <Route path="/Login" element={<Login/>} />
        <Route path="/Aggressive" element={<Aggressive/>} />
        <Route path="/Attendance" element={<Attendance/>} />
        <Route path="/Choking" element={<Choking/>} />
        <Route path="/EmptyCounter" element={<EmptyCounter/>} />
        <Route path="/FaceMask" element={<FaceMask/>} />
        <Route path="/Fainting" element={<Fainting/>} />
        <Route path="/Smoking" element={<Smoking/>} />
        <Route path="/SocialDistancing" element={<SocialDistancing/>} />
        <Route path="/Weapon" element={<Weapon/>} />
      </Routes>
    <Footer />
  </Wrapper>
</BrowserRouter>

这应该能解决问题。

React挂钩2020:)

import React, { useLayoutEffect } from 'react';
import { useLocation } from 'react-router-dom';

const ScrollToTop: React.FC = () => {
  const { pathname } = useLocation();
  useLayoutEffect(() => {
    window.scrollTo(0, 0);
  }, [pathname]);

  return null;
};

export default ScrollToTop;

一个可以添加到Route组件的React Hook。使用uselayouteeffect而不是自定义监听器。

import React, { useLayoutEffect } from 'react';
import { Switch, Route, useLocation } from 'react-router-dom';

export default function Routes() {
  const location = useLocation();
  // Scroll to top if path changes
  useLayoutEffect(() => {
    window.scrollTo(0, 0);
  }, [location.pathname]);

  return (
      <Switch>
        <Route exact path="/">

        </Route>
      </Switch>
  );
}

更新:更新到使用useLayoutEffect而不是useEffect，以减少视觉上的干扰。大致可以理解为:

useEffect:渲染组件->油漆到屏幕->滚动到顶部(运行效果) useLayoutEffect:渲染组件->滚动到顶部(运行效果)->油漆到屏幕

取决于您是在加载数据(考虑旋转器)还是有页面转换动画，useEffect可能更适合您。