如何在 react.js 中递归渲染子组件

中递归渲染子组件

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如何在 react.js 中递归渲染子组件

本文介绍了如何在 react.js 中递归渲染子组件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想从它自己的组件中递归地添加一个 react 组件.我看到了一个树组件，它通过子树节点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.这个想法是有一个简单的评论组件，回复将重用相同的组件.

var Comment = React.createClass({渲染:函数(){返回 (<div className="评论">{/* 文本和作者 */}<div className="注释文本"><span className="author">{this.props.author}</span><span className="body" risklySetInnerHTML={{__html: this.props.body}}/>

{/* 回复 */}<div className="回复">{this.props.reply.map(function(reply) {<评论正文={reply.body} author={reply.author}/>}.bind(this))}

);}});

我收到以下错误消息:

未捕获的类型错误:无法构造注释":请使用新"运算符，此 DOM 对象构造函数不能作为函数调用.

这是传递给组件的 JSON 数据的示例.

{ "author" : "某个用户","body" : "
很棒的作品",回复":[ {作者":用户回复"，"body" : "<div 是的，这很棒</div>"},{ "author" : "另一个用户正在回复","body" : "<div 真的很棒！</div>"}]}

解决方案

如果我将子节点创建为渲染方法顶部的对象，它工作正常.

export default class extends React.Component {让回复 = null如果(this.props.replys){回复 = this.props.reply.map((reply) => {返回 (<评论作者={reply.author} body={reply.body}/>)})}使成为() {返回 (<div className="评论"><div className="replys">{replys }</div>

)}}

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>
    );
  }
});

I get the following error message:

Uncaught TypeError: Failed to construct 'Comment': Please use the 'new' operator, this DOM object constructor cannot be called as a function.

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>"
      }
    ]
}

解决方案

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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08-12 03:41