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;

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);

这个答案只适用于v4版本，而不适用于后续版本。

React Router v4的文档包含了用于滚动恢复的代码示例。下面是他们的第一个代码示例，它作为一个全站解决方案，当页面导航到“滚动到顶部”:

class ScrollToTop extends Component {
  componentDidUpdate(prevProps) {
    if (this.props.location !== prevProps.location) {
      window.scrollTo(0, 0)
    }
  }

  render() {
    return this.props.children
  }
}

export default withRouter(ScrollToTop)

然后在你的应用程序的顶部渲染它，但在路由器下面:

const App = () => (
  <Router>
    <ScrollToTop>
      <App/>
    </ScrollToTop>
  </Router>
)

// or just render it bare anywhere you want, but just one :)
<ScrollToTop/>

^直接从文档中复制

显然，这适用于大多数情况，但是关于如何处理选项卡接口以及为什么没有实现通用解决方案还有更多内容。

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>
  )
}

我唯一的解决方案是在每个文件中添加一行代码，例如:

import React from 'react';
const file = () => { document.body.scrollTop = 0; return( <div></div> ) }

这有点老套(但很有效):我只是添加

Window. ScrollTo (0, 0);

呈现();