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;
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)
}
}
对于React v18+,我的建议是使用包装器组件,这将是最简单的执行方式。
步骤1:创建一个ScrollToTop组件(component/ScrollToTop.js)
import { useEffect } from "react";
import { useLocation } from "react-router-dom";
export function ScrollToTop() {
const { pathname } = useLocation();
useEffect(() => {
window.scrollTo(0, 0);
}, [pathname]);
return null;
}
步骤2:用index.js包装你的应用程序
<React.StrictMode>
<BrowserRouter>
<ScrollToTop />
<App />
</BrowserRouter>
</React.StrictMode>
解释:每次路径名更改时,useEffect将被调用以将页面滚动到顶部。
这段代码将导致滚动的平滑行为:
<div onClick={() => {
ReactDOM.findDOMNode(this.headerRef)
.scrollIntoView({behavior: "smooth"});
}}
className='go-up-button' >
</div>
你可以在scrollIntoView()中传递其他参数
可以使用以下语法:
element.scrollIntoView();
element.scrollIntoView(alignToTop); // Boolean parameter
element.scrollIntoView(scrollIntoViewOptions); // Object parameter
alignToTop可选
为布尔值:
If true, the top of the element will be aligned to the top of the visible area of the scrollable ancestor. Corresponds to scrollIntoViewOptions: {block: "start", inline: "nearest"}. This is the default value.
If false, the bottom of the element will be aligned to the bottom of the visible area of the scrollable ancestor. Corresponds to scrollIntoViewOptions: {block: "end", inline: "nearest"}.
scrollIntoViewOptions可选
是具有以下属性的对象:
*behavior* Optional
Defines the transition animation.
One of "auto", "instant", or "smooth". Defaults to "auto".
*block* Optional
One of "start", "center", "end", or "nearest". Defaults to "center".
*inline* Optional
One of "start", "center", "end", or "nearest". Defaults to "nearest".
更多细节可以在这里找到:MDN文档