我有个问题,我不知道怎么解决。
在我的react组件中,我在底部显示了一个很长的数据列表和一些链接。
点击任何链接后,我在列表中填充了新的链接集合,需要滚动到顶部。
问题是-如何滚动到顶部后,新的集合呈现?
'use strict';
// url of this component is #/:checklistId/:sectionId
var React = require('react'),
Router = require('react-router'),
sectionStore = require('./../stores/checklist-section-store');
function updateStateFromProps() {
var self = this;
sectionStore.getChecklistSectionContent({
checklistId: this.getParams().checklistId,
sectionId: this.getParams().sectionId
}).then(function (section) {
self.setState({
section,
componentReady: true
});
});
this.setState({componentReady: false});
}
var Checklist = React.createClass({
mixins: [Router.State],
componentWillMount: function () {
updateStateFromProps.call(this);
},
componentWillReceiveProps(){
updateStateFromProps.call(this);
},
render: function () {
if (this.state.componentReady) {
return(
<section className='checklist-section'>
<header className='section-header'>{ this.state.section.name } </header>
<Steps steps={ this.state.section.steps }/>
<a href=`#/${this.getParams().checklistId}/${this.state.section.nextSection.Id}`>
Next Section
</a>
</section>
);
} else {...}
}
});
module.exports = Checklist;
钩的解决方案:
创建一个ScrollToTop钩子
import { useEffect } from "react";
import { withRouter } from "react-router-dom";
const ScrollToTop = ({ children, location: { pathname } }) => {
useEffect(() => {
window.scrollTo({
top: 0,
left: 0,
behavior: "smooth"
});
}, [pathname]);
return children || null;
};
export default withRouter(ScrollToTop);
用它包装你的应用程序
<Router>
<ScrollToTop>
<App />
</ScrollToTop>
</Router>
文档:https://reacttraining.com/react-router/web/guides/scroll-restoration
我正在使用React Hooks,想要一些可重用的东西,但也想要一些我可以随时调用的东西(而不是仅仅在渲染之后)。
// utils.js
export const useScrollToTop = (initialScrollState = false) => {
const [scrollToTop, setScrollToTop] = useState(initialScrollState);
useEffect(() => {
if (scrollToTop) {
setScrollToTop(false);
try {
window.scroll({
top: 0,
left: 0,
behavior: 'smooth',
});
} catch (error) {
window.scrollTo(0, 0);
}
}
}, [scrollToTop, setScrollToTop]);
return setScrollToTop;
};
然后使用钩子你可以做:
import { useScrollToTop } from 'utils';
const MyPage = (props) => {
// initialise useScrollToTop with true in order to scroll on page load
const setScrollToTop = useScrollToTop(true);
...
return <div onClick={() => setScrollToTop(true)}>click me to scroll to top</div>
}
你可以用这样的东西。ReactDom是react的缩写。否则只需React即可。
componentDidUpdate = () => { ReactDom.findDOMNode(this).scrollIntoView(); }
2019年5月11日更新React 16+
构造函数(道具){
超级(道具)
这一点。childDiv = React.createRef()
}
componentDidMount = () => this.handleScroll()
componentDidUpdate = () => this.handleScroll()
handleScroll = () => {
Const {index, selected} = this.props
If (index === selected) {
setTimeout(() => {
this.childDiv.current。scrollIntoView({behavior: 'smooth'})
}, 500)
}
}