Don*_*n P 32 javascript react-router
如何使用react-router,并将链接导航到特定页面上的特定位置?(例如/home-page#section-three)
细节:
我正在使用react-router我的React应用程序.
我有一个站点范围的导航栏,需要链接到页面的特定部分,如/home-page#section-three.
因此,即使您在说/blog,单击此链接仍将加载主页,第三部分滚动到视图中.这正是标准的<a href="/home-page#section-three>运作方式.
注意:react-router的创建者没有给出明确的答案.他们说它正在进行中,并且同时使用其他人的答案.我会尽力保持这个问题的最新进展和可能的解决方案,直到出现主导的问题.
研究:
这个问题是从2015年(所以10年前的反应时间).最受欢迎的答案是用来HistoryLocation代替HashLocation.基本上这意味着将位置存储在窗口历史记录中,而不是存储在哈希片段中.
坏消息是......即使使用HistoryLocation(大多数教程和文档在2016年所说的内容),锚标签仍然不起作用.
https://github.com/ReactTraining/react-router/issues/394
ReactTraining上的一个线程,关于如何使用anchor链接与react-router.这是没有确认的答案.要小心,因为大多数建议的答案都已过时(例如使用"哈希"道具<Link>)
mal*_*r53 22
React Router Hash Link为我工作.易于安装和实施:
$ npm install --save react-router-hash-link
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在component.js中将其导入为Link:
import { HashLink as Link } from 'react-router-hash-link';
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而不是使用锚<a>,使用<Link> :
<Link to="home-page#section-three">Section three</Link>
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注意:我使用HashRouter而不是Router:
Don*_*n P 21
这是我找到的一个解决方案(2016年10月).它是跨浏览器兼容的(在ie,ff,chrome,mobile safari,safari中测试).
您可以为onUpdate路由器提供属性.只要路由更新,就会调用此方法.此解决方案使用onUpdate属性检查是否存在与哈希匹配的DOM元素,然后在路由转换完成后滚动到该元素.
您必须使用browserHistory而不是hashHistory.
在这个帖子中,答案是"Rafrax" .
将此代码添加到您定义的位置<Router>:
import React from 'react';
import { render } from 'react-dom';
import { Router, Route, browserHistory } from 'react-router';
const routes = (
// your routes
);
function hashLinkScroll() {
const { hash } = window.location;
if (hash !== '') {
// Push onto callback queue so it runs after the DOM is updated,
// this is required when navigating from a different page so that
// the element is rendered on the page before trying to getElementById.
setTimeout(() => {
const id = hash.replace('#', '');
const element = document.getElementById(id);
if (element) element.scrollIntoView();
}, 0);
}
}
render(
<Router
history={browserHistory}
routes={routes}
onUpdate={hashLinkScroll}
/>,
document.getElementById('root')
)
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如果您感觉懒惰并且不想复制该代码,则可以使用仅为您定义该功能的Anchorate.https://github.com/adjohnson916/anchorate
Mat*_*tta 21
这是一个不需要任何订阅或第三方软件包的简单解决方案。它应该与react-router@3和一起使用和react-router-dom。
工作示例:https : //fglet.codesandbox.io/
来源(不幸的是,它目前在编辑器中不起作用):
#ScrollHandler 钩子示例
import { useEffect } from "react";
import PropTypes from "prop-types";
import { withRouter } from "react-router-dom";
const ScrollHandler = ({ location, children }) => {
useEffect(
() => {
const element = document.getElementById(location.hash.replace("#", ""));
setTimeout(() => {
window.scrollTo({
behavior: element ? "smooth" : "auto",
top: element ? element.offsetTop : 0
});
}, 100);
}, [location]);
);
return children;
};
ScrollHandler.propTypes = {
children: PropTypes.node.isRequired,
location: PropTypes.shape({
hash: PropTypes.string,
}).isRequired
};
export default withRouter(ScrollHandler);
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#ScrollHandler 类示例
import { PureComponent } from "react";
import PropTypes from "prop-types";
import { withRouter } from "react-router-dom";
class ScrollHandler extends PureComponent {
componentDidMount = () => this.handleScroll();
componentDidUpdate = prevProps => {
const { location: { pathname, hash } } = this.props;
if (
pathname !== prevProps.location.pathname ||
hash !== prevProps.location.hash
) {
this.handleScroll();
}
};
handleScroll = () => {
const { location: { hash } } = this.props;
const element = document.getElementById(hash.replace("#", ""));
setTimeout(() => {
window.scrollTo({
behavior: element ? "smooth" : "auto",
top: element ? element.offsetTop : 0
});
}, 100);
};
render = () => this.props.children;
};
ScrollHandler.propTypes = {
children: PropTypes.node.isRequired,
location: PropTypes.shape({
hash: PropTypes.string,
pathname: PropTypes.string,
})
};
export default withRouter(ScrollHandler);
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rit*_*njn 12
此解决方案适用于 react-router v5
import React, { useEffect } from 'react'
import { Route, Switch, useLocation } from 'react-router-dom'
export default function App() {
const { pathname, hash } = useLocation();
useEffect(() => {
// if not a hash link, scroll to top
if (hash === '') {
window.scrollTo(0, 0);
}
// else scroll to id
else {
setTimeout(() => {
const id = hash.replace('#', '');
const element = document.getElementById(id);
if (element) {
element.scrollIntoView();
}
}, 0);
}
}, [pathname]); // do this on route change
return (
<Switch>
<Route exact path="/" component={Home} />
.
.
</Switch>
)
}
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在组件中
<Link to="/#home"> Home </Link>
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ale*_*511 10
只是避免使用 react-router 进行本地滚动:
document.getElementById('myElementSomewhere').scrollIntoView()
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这个问题唐普的回答有时会与ID的元素仍然被渲染或装载,如果该节取决于一些异步操作。以下函数将尝试通过 id 查找元素并导航到该元素并每 100 毫秒重试一次,直到达到最多 50 次重试:
scrollToLocation = () => {
const { hash } = window.location;
if (hash !== '') {
let retries = 0;
const id = hash.replace('#', '');
const scroll = () => {
retries += 0;
if (retries > 50) return;
const element = document.getElementById(id);
if (element) {
setTimeout(() => element.scrollIntoView(), 0);
} else {
setTimeout(scroll, 100);
}
};
scroll();
}
}
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我将Don P 的解决方案(见上文)改编为react-router4(2019 年 1 月),因为不再有任何onUpdate道具<Router>。
import React from 'react';
import * as ReactDOM from 'react-dom';
import { Router, Route } from 'react-router';
import { createBrowserHistory } from 'history';
const browserHistory = createBrowserHistory();
browserHistory.listen(location => {
const { hash } = location;
if (hash !== '') {
// Push onto callback queue so it runs after the DOM is updated,
// this is required when navigating from a different page so that
// the element is rendered on the page before trying to getElementById.
setTimeout(
() => {
const id = hash.replace('#', '');
const element = document.getElementById(id);
if (element) {
element.scrollIntoView();
}
},
0
);
}
});
ReactDOM.render(
<Router history={browserHistory}>
// insert your routes here...
/>,
document.getElementById('root')
)
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<Link to='/homepage#faq-1'>Question 1</Link>
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useEffect(() => {
const hash = props.history.location.hash
if (hash && document.getElementById(hash.substr(1))) {
// Check if there is a hash and if an element with that id exists
document.getElementById(hash.substr(1)).scrollIntoView({behavior: "smooth"})
}
}, [props.history.location.hash]) // Fires when component mounts and every time hash changes
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