Javascript React JS-未捕获类型错误：无法读取属性'；绑定&x27；未定义的

当用户单击

SingleTopicBox

component并隐藏

SelectedTopicPage

组件时，我想显示

TopicsList

组件。但是，我得到了一个错误：

uncaughttypeerror:无法读取topic-list.jsx文件中未定义的

的属性“bind”

主控制器.jsx

import {React, ReactDOM} from '../../../build/react';

import TopicsList from '../topic-list.jsx';
import SelectedTopicPage from '../selected-topic-page.jsx';
import topicPages from '../../content/json/topic-pages.js';

export default class MainController extends React.Component {

  state = {
    isTopicClicked: false,
    topicPages
  };

  onClick(topicID) {
    this.setState({isTopicClicked: true});
    this.setState({topicsID: topicID});
  };

  render() {
    return (
      <div className="row">
        {this.state.isTopicClicked
          ? <SelectedTopicPage topicsID={this.state.topicsID} key={this.state.topicsID} topicPages={topicPages}/>
          : <TopicsList/>}
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

import SingleTopicBox from './single-topic-box.jsx';
import SelectedTopicPage from './selected-topic-page.jsx';
import topicPages from '../content/json/topic-pages.js';

export default class TopicsList extends React.Component {
  onClick(){
    this.props.onClick.bind(null, this.topicID);
  },
  render() {
    return (
      <div className="row topic-list">
        <SingleTopicBox topicID="1" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="2" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="3" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="4" onClick={this.onClick} label="Topic"/>
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

export default class SingleTopicBox extends React.Component {

    render() {
        return (
            <div>
                <div className="col-sm-2">
                    <div className="single-topic" data-topic-id={this.props.topicID}>
                        {this.props.label} {this.props.topicID}
                    </div>
                </div>
            </div>
        );
    }
};

从'../../../build/React'导入{React，ReactDOM}；
从“../topic list.jsx”导入TopicsList；
从“../SelectedTopicPage.jsx”导入SelectedTopicPage；
从“../../content/json/topic pages.js”导入主题页面；
导出默认类MainController扩展React.Component{
状态={
伊斯托弗：错，
主题页
};
onClick（topicID）{
this.setState（{isTopicClicked:true}）；
this.setState（{topicsID:topicID}）；
};
render（）{
返回(
{this.state.istopick
? 
: }
);
}
};

主题列表.jsx

import {React, ReactDOM} from '../../../build/react';

import TopicsList from '../topic-list.jsx';
import SelectedTopicPage from '../selected-topic-page.jsx';
import topicPages from '../../content/json/topic-pages.js';

export default class MainController extends React.Component {

  state = {
    isTopicClicked: false,
    topicPages
  };

  onClick(topicID) {
    this.setState({isTopicClicked: true});
    this.setState({topicsID: topicID});
  };

  render() {
    return (
      <div className="row">
        {this.state.isTopicClicked
          ? <SelectedTopicPage topicsID={this.state.topicsID} key={this.state.topicsID} topicPages={topicPages}/>
          : <TopicsList/>}
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

import SingleTopicBox from './single-topic-box.jsx';
import SelectedTopicPage from './selected-topic-page.jsx';
import topicPages from '../content/json/topic-pages.js';

export default class TopicsList extends React.Component {
  onClick(){
    this.props.onClick.bind(null, this.topicID);
  },
  render() {
    return (
      <div className="row topic-list">
        <SingleTopicBox topicID="1" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="2" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="3" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="4" onClick={this.onClick} label="Topic"/>
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

export default class SingleTopicBox extends React.Component {

    render() {
        return (
            <div>
                <div className="col-sm-2">
                    <div className="single-topic" data-topic-id={this.props.topicID}>
                        {this.props.label} {this.props.topicID}
                    </div>
                </div>
            </div>
        );
    }
};

从'../../build/React'导入{React，ReactDOM}；
从“./single topic box.jsx”导入SingleTopicBox；
从“./selected topic page.jsx”导入SelectedTopicPage；
从“../content/json/topic pages.js”导入topicPages；
导出默认类TopicsList扩展React.Component{
onClick（）{
this.props.onClick.bind（null，this.topicID）；
},
render（）{
返回(
);
}
};

单主题框.jsx

import {React, ReactDOM} from '../../../build/react';

import TopicsList from '../topic-list.jsx';
import SelectedTopicPage from '../selected-topic-page.jsx';
import topicPages from '../../content/json/topic-pages.js';

export default class MainController extends React.Component {

  state = {
    isTopicClicked: false,
    topicPages
  };

  onClick(topicID) {
    this.setState({isTopicClicked: true});
    this.setState({topicsID: topicID});
  };

  render() {
    return (
      <div className="row">
        {this.state.isTopicClicked
          ? <SelectedTopicPage topicsID={this.state.topicsID} key={this.state.topicsID} topicPages={topicPages}/>
          : <TopicsList/>}
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

import SingleTopicBox from './single-topic-box.jsx';
import SelectedTopicPage from './selected-topic-page.jsx';
import topicPages from '../content/json/topic-pages.js';

export default class TopicsList extends React.Component {
  onClick(){
    this.props.onClick.bind(null, this.topicID);
  },
  render() {
    return (
      <div className="row topic-list">
        <SingleTopicBox topicID="1" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="2" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="3" onClick={this.onClick} label="Topic"/>
        <SingleTopicBox topicID="4" onClick={this.onClick} label="Topic"/>
      </div>
    );
  }
};

import {React, ReactDOM} from '../../build/react';

export default class SingleTopicBox extends React.Component {

    render() {
        return (
            <div>
                <div className="col-sm-2">
                    <div className="single-topic" data-topic-id={this.props.topicID}>
                        {this.props.label} {this.props.topicID}
                    </div>
                </div>
            </div>
        );
    }
};

从'../../build/React'导入{React，ReactDOM}；
导出默认类SingleTopicBox扩展React.Component{
render（）{
返回(
{this.props.label}{this.props.topicID}
);
}
};

您有几个错误

您应该将

onClick

传递到

TopicsList

render() {
  return (
    <div className="row">
      {this.state.isTopicClicked
        ? <SelectedTopicPage 
             topicsID={this.state.topicsID} 
             key={this.state.topicsID} 
             topicPages={topicPages} />
        : <TopicsList onClick={ this.onClick.bind(this) } />}
    </div>
  );
}

通过

onClick

从

props

<SingleTopicBox topicID="1" onClick={this.props.onClick} label="Topic"/>

您不需要调用

setState

两次

 onClick(topicID) {
   this.setState({
     isTopicClicked: true, 
     topicsID: topicID
   });
 }