Javascript ';必须返回有效的React元素(或null)';ReactJS中的一个组件出错
我的代码是这样的Javascript ';必须返回有效的React元素(或null)';ReactJS中的一个组件出错,javascript,reactjs,Javascript,Reactjs,我的代码是这样的 var data = [ {id: 1, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"}, {id: 2, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaao
var data = [
{id: 1, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"},
{id: 2, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"},
{id: 3, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"},
{id: 4, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"},
{id: 5, taskName: "Pete Hunt", standarDescription: "This is one comment", emplComment: "meaaow I am meeawo", empRating : "1"}
];
var Tableforbasictask = React.createClass({
render: function() {
return (
<div className="downloadlinks">
<table className="table table-bordered table-striped-col nomargin" id="table-data">
<tbody>
<tr align="center">
<td>Task Name</td>
<td>Standard Discription of Task</td>
<td>Employee Comment</td>
<td>Employee rating</td>
</tr>
<TableforbasictaskList data={this.props.data} />
<TableforbasictaskForm />
</tbody>
</table>
</div>
);
}
});
var TableforbasictaskForm = React.createClass({
render: function() {
return (
<div className="commentForm">
Hello, world! I am a CommentForm.
</div>
);
}
});
var Addcontenttotable = React.createClass({
render: function() {
return (
<tr><td>{this.props.taskName}</td>
<td>{this.props.standarDescription}</td>
<td>{this.props.emplComment}</td>
<td>{this.props.empRating}</td>
</tr>
);
}
});
var TableforbasictaskList = React.createClass({
render: function() {
var commentNodes = this.props.data.map(function(comment) {
return (
<Addcontenttotable taskName={comment.taskName} standarDescription={comment.standarDescription} emplComment={comment.emplComment} empRating={comment.empRating} key={comment.id}>
</Addcontenttotable>
);
});
return (
{commentNodes}
);
}
});
ReactDOM.render(<div><Tableforbasictask data={data} /></div>, document.getElementById('content'));
var数据=[
{id:1,任务名:“皮特·亨特”,标准描述:“这是一条评论”,雇员评论:“我是米阿沃”,注释:“1”},
{id:2,任务名:“皮特·亨特”,标准描述:“这是一条评论”,雇员评论:“我是米阿沃”,注释:“1”},
{id:3,任务名:“皮特·亨特”,标准描述:“这是一条评论”,雇员评论:“我是米阿沃”,注释:“1”},
{id:4,任务名:“皮特·亨特”,标准描述:“这是一条评论”,雇员评论:“我是米阿沃”,注释:“1”},
{id:5,任务名:“皮特·亨特”,标准描述:“这是一条评论”,雇员评论:“我是米阿沃”,注释:“1”}
];
var Tableforbasictask=React.createClass({
render:function(){
返回(
任务名称
任务的标准描述
员工意见
员工评级
);
}
});
var TableforbasictaskForm=React.createClass({
render:function(){
返回(
你好,世界!我是一个评论人。
);
}
});
var Addcontenttotable=React.createClass({
render:function(){
返回(
{this.props.taskName}
{this.props.StandardDescription}
{this.props.emplComment}
{this.props.emplating}
);
}
});
var TableforbasictaskList=React.createClass({
render:function(){
var commentNodes=this.props.data.map(函数(注释){
返回(
感谢您的帮助呈现
应返回单个根元素
返回(
{commentNodes}
);
更新。使用tbody作为包装器的更有效选项
return (<tbody>
{commentNodes}
</tbody>);
返回(
{commentNodes}
);
必须对组件进行反应,因为您在表中使用TableforbasictaskList
时,需要将commentNodes
包装在
中,也需要将Tableforbasictask
从表中移动TableforbasictaskForm
var TableforbasictaskList = React.createClass({
render: function() {
// .....
return (<tbody>{commentNodes}</tbody>);
}
});
var Tableforbasictask = React.createClass({
render: function() {
return <div className="downloadlinks">
<table
className="table table-bordered table-striped-col nomargin"
id="table-data"
>
<thead>
<tr align="center">
<td>Task Name</td>
<td>Standard Discription of Task</td>
<td>Employee Comment</td>
<td>Employee rating</td>
</tr>
</thead>
<TableforbasictaskList data={this.props.data} />
</table>
<TableforbasictaskForm />
</div>
}
});
var TableforbasictaskList=React.createClass({
render:function(){
// .....
返回({commentNodes});
}
});
var Tableforbasictask=React.createClass({
render:function(){
返回
任务名称
任务的标准描述
员工意见
员工评级
}
});
您是否尝试过在这个问题中格式化代码,甚至在fiddle editor中格式化代码?@对不起,我现在修复了fiddle链接,请稍后再试look@YuryTarbanko但是它没有正确地将值映射到正确的列中,您能告诉我如何做吗?不确定您的意思。表中已经有div了,这是不正确的。:)您可以使用tr
或td
,这取决于您需要如何安排元素。或者更好的是,您可以使用div来代替,并使用样式来制作布局。谢谢您我理解了,谢谢您我是一名PHP开发人员,所以在ReactJs中工作有点困难(PAA;),但我相信我会掌握它
var TableforbasictaskList = React.createClass({
render: function() {
// .....
return (<tbody>{commentNodes}</tbody>);
}
});
var Tableforbasictask = React.createClass({
render: function() {
return <div className="downloadlinks">
<table
className="table table-bordered table-striped-col nomargin"
id="table-data"
>
<thead>
<tr align="center">
<td>Task Name</td>
<td>Standard Discription of Task</td>
<td>Employee Comment</td>
<td>Employee rating</td>
</tr>
</thead>
<TableforbasictaskList data={this.props.data} />
</table>
<TableforbasictaskForm />
</div>
}
});