如何递归地呈现react.js中的子组件 [英] how to render child components in react.js recursively

问题描述

我想以递归方式从其自己的组件中添加react组件。我看到了一个树组件，它通过子TreeNodes进行映射并以相同的方式添加子节点。不幸的是，它对我来说根本不起作用。想法是有一个简单的注释组件，回复将重用相同的组件。

I wanted to recursively add a react component from within its own component. I saw this example of a tree component which was mapping through the child TreeNodes and adding child nodes in the same way. Unfortunately it doesn't work at all for me. The idea was to have a simple comment component, and the replies would reuse the same component.

var Comment = React.createClass({
  render: function() {    
    return (
        <div className="comment">

          {/* text and author */}
          <div className="comment-text">
            <span className="author">{this.props.author}</span>         
            <span className="body" dangerouslySetInnerHTML={{__html: this.props.body}} />
          </div>

          {/* replies */}
          <div className="replies">
           {
             this.props.replies.map(function(reply) {
               <Comment body={reply.body} author={reply.author} />
             }.bind(this))
          }
          </div>

      </div>
    );
  }
});

我收到以下错误消息：

未捕获TypeError：无法构造'Comment'：请使用'new'运算符，此DOM对象构造函数不能作为函数调用。

这里是传递给组件的JSON数据的一个示例。

here is an example of the JSON data passed to the component.

{ "author" : "Some user",
  "body" : "<div>Great work</div>",
  "replies" : [ { "author" : "A user replying",
        "body" : "<div Yes it was great work</div>"
      },
      { "author" : "Another user replying",
        "body" : "<div It really was great work!</div>"
      }
    ]
}

推荐答案

如果我在渲染方法的顶部创建子节点作为对象，它可以正常工作。

If I create the child nodes as an object at the top of the render method, it works fine.

export default class extends React.Component {
  let replies = null
  if(this.props.replies){
    replies = this.props.replies.map((reply) => {
      return (
        <Comment author={reply.author} body={reply.body} />
      )
    })
  }

  render() {
    return (
      <div className="comment">
        <div className="replies">{ replies }</div>
      </div>
    )
  }
}

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