javascript - 警告 : validateDOMNesting(. ..): 不能作为 的子项出现

Question

我正在 React 中创建一个表(我是 React 的新手)，但是我们可以使用 CategoryData 还是应该使用其他东西？它没有正确创建单元格，即它创建的单元格未与 <th> 对齐来自父级的，它们根本没有单元格边框。它还会发出以下警告:

Warning: validateDOMNesting(...): <div> cannot appear as a child of <tbody>. See Param > tbody > Row > div.
Warning: validateDOMNesting(...): <tr> cannot appear as a child of <div>. See Row > div > tr.
Warning: validateDOMNesting(...): <tr> cannot appear as a child of <div>. See CategoryData > div > tr.

我不确定为什么会出现这些警告以及为什么表格单元格(来自 CategoryData )没有对齐并且没有单元格边框。 正确的方法是什么？

代码

var Param = React.createClass({

    getInitialState: function() {
        return {
            isLoading: true,
            panelTitle: "",
            data: [],
            categories: []
        }
    },

    updateState: function() {
        var that = this;
        var categories = new Set();
        rest.getParameters('service').then(function (results) {
            for (var i = 0; i < results.data.length; i++) {
                categories.add(results.data[i].category);
            }
            that.setState({
                data: results.data,
                categories: Array.from(categories)
            })
        }).catch(function (err) {
            console.error('rest.getParameters(): ', err);
            that.setState({
                isLoading: true,
                data: [],
                categories: []
            })
        });
    },

    componentDidMount: function() {
        this.updateState();
    },

    render: function() {
      return (
        <Panel className="panel-info" header={<h4 className="panel-title">Service Config</h4>}>
            <div>
                <table className="table table-striped table-bordered table-hover table-condensed table-responsive">
                    <thead>
                        <tr>
                            <th className="col-lg-2 text-center">AMP Name</th>
                            <th className="col-lg-2 text-center">Athena Name</th>
                            <th className="col-lg-2 text-center">Description</th>
                            <th className="col-lg-1 text-center">Default</th>
                            <th className="col-lg-1 text-center">Min Value</th>
                            <th className="col-lg-1 text-center">Max Value</th>
                            <th className="col-lg-1 text-center">Action</th>
                        </tr>
                    </thead>
                    <tbody>
                        {this.state.categories.map((category, index) =>
                            <th colSpan="7" key={index} style={{'textAlign':'left', 'paddingLeft':'5px', 'backgroundColor': '#D3D0CF'}}>{this.state.category}</th>
                            this.state.data.map((row, i) =>
                                if (row.category === category) {
                                    <tr key={i}>
                                        <td className="col-lg-2 text-center">{row.name}</td>
                                        <td className="col-lg-2 text-center">{row.alias}</td>
                                        <td className="col-lg-2 text-center">{row.description}</td>
                                        <td className="col-lg-1 text-center">{row.default_value}</td>
                                        <td className="col-lg-1 text-center">{row.min_value}</td>
                                        <td className="col-lg-1 text-center">{row.max_value}</td>
                                        <td className="col-lg-1 text-center">Action</td>
                                    </tr>
                                }
                            )  
                        )}
                    </tbody>
                </table>
            </div>
        </Panel>
    );
  }
});

Answer 1

我会将“th”更改为“tr”，因为我很确定如果你在“tbody”中添加“th”，React 会给你一个警告

let finalList = []
this.state.categories.forEach( (cat, index) => {
   finalList.push(<tr...>{this.state.category}</tr>)
   this.state.data.forEach( (row, index) => {
      if(row.category === cat){
         finalList.push(
             <tr key={i}>
                 <td className="col-lg-2 text-center">{row.name}</td>
                 <td className="col-lg-2 text-center">{row.alias}</td>
                 <td className="col-lg-2 text-center">{row.description}</td>
                 <td className="col-lg-1 text-center">{row.default_value}</td>
                 <td className="col-lg-1 text-center">{row.min_value}</td>
                 <td className="col-lg-1 text-center">{row.max_value}</td>
                 <td className="col-lg-1 text-center">Action</td>
             </tr>
          )
      }
   })
})

警告的话我会避免使用表结帐 css 网格，它们更加灵活且得到很好的支持