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;
我正在使用react-router ScrollToTop组件，该组件的代码在react-router文档中描述
https://reacttraining.com/react-router/web/guides/scroll-restoration/scroll-to-top
我在单个路由文件中更改代码，之后不需要在每个组件中更改代码。
示例代码-
步骤1 -创建ScrollToTop.js组件
import React, { Component } from 'react';
import { withRouter } from 'react-router';
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)
步骤2 -在App.js文件中，在<Router后添加ScrollToTop Component
const App = () => (
<Router>
<ScrollToTop>
<App/>
</ScrollToTop>
</Router>
)
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
我已经尝试过@sledgeweight解决方案，但它并不适用于某些视图。但是添加setTimeout似乎可以完美地工作。以防有人遇到和我一样的问题。下面是我的代码。
import { useEffect } from 'react'
import { useLocation } from 'react-router-dom'
const ScrollToTop = () => {
const { pathname } = useLocation()
useEffect(() => {
console.log(pathname)
/* settimeout make sure this run after components have rendered. This will help fixing bug for some views where scroll to top not working perfectly */
setTimeout(() => {
window.scrollTo({ top: 0, behavior: 'smooth' })
}, 0)
}, [pathname])
return null
}
export default ScrollToTop
在AppRouter.js中使用它
<Router>
<ScrollToTop/>
<App>
</Router>
