change scrollTop in reactjs

Question

I just learn react, and want to achieve a function : both A,B are components, if A scroll, then B scroll

The following is my code

<

Answer 1

Here's an updated version of Season's answer, including a runnable snippet. It uses the recommended method for creating refs.

class Editor extends React.Component {
    constructor(props) {
        super(props);
        this.content = React.createRef();
        this.handleScroll = this.handleScroll.bind(this);
    }

    componentDidUpdate() {
        this.content.current.scrollTop = this.props.scrollTop;
    }
    
    handleScroll() {
        this.props.onScroll( this.content.current.scrollTop );
    }

    render() {
        let text = 'a\n\nb\n\nc\n\nd\n\ne\n\nf\n\ng';
        return ;
    }
}

class App extends React.Component {
    constructor(props) {
        super(props);
        this.state = {scrollTop: 0};
        this.handleScroll = this.handleScroll.bind(this);
    }

    handleScroll(scrollTop) {
        this.setState({scrollTop: scrollTop});
    }

    render() {
        return <table><tbody>
            <tr><th>Foo</th><th>Bar</th></tr>
            <tr>
                <td><Editor
                    scrollTop={this.state.scrollTop}
                    onScroll={this.handleScroll}/></td>
                <td><Editor
                    scrollTop={this.state.scrollTop}
                    onScroll={this.handleScroll}/></td>
            </tr>
        </tbody></table>;
    }
}

ReactDOM.render(
    <App/>,
    document.getElementById('root')
);</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code><script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<div id="root"></div></code></pre>
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                                 var isueditor=1;
            var editor = UE.getEditor('editor',{
                //这里可以选择自己需要的工具按钮名称,此处仅选择如下五个
                toolbars:[['source','fullscreen',  '|', 'undo', 'redo', '|', 'bold', 'italic', 'underline', 'fontborder', 'strikethrough', 'removeformat', 'formatmatch', 'autotypeset', 'blockquote', 'pasteplain', '|', 'forecolor', 'backcolor', 'insertorderedlist', 'insertunorderedlist', 'selectall', 'cleardoc', '|', 'rowspacingtop', 'rowspacingbottom', 'lineheight', '|', 'customstyle', 'paragraph', 'fontfamily', 'fontsize', '|', 'indent', '|', 'justifyleft', 'justifycenter', 'justifyright', 'justifyjustify', '|', 'link', 'unlink', 'anchor', '|', 'simpleupload', 'insertimage', 'scrawl', 'insertvideo', 'attachment', 'map', 'insertcode', '|', 'horizontal', '|', 'preview', 'searchreplace', 'drafts']],
            
                initialContent:'',
                //关闭字数统计
                wordCount:false,
                zIndex:2,
                //关闭elementPath
                elementPathEnabled:false,
                //默认的编辑区域高度
                initialFrameHeight:250
                //更多其他参数，请参考ueditor.config.js中的配置项
                //更多其他参数，请参考ueditor.config.js中的配置项
            });
                        editor.ready(function() {
            	editor.setDisabled();
            	});
                            $("#editor").find("*").css("max-width","362px");
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