ReactJS:点击时动态添加组件

从'react'导入反应；从 'react-dom' 导入 ReactDOM；导入'./index.css'；从'./Menu'导入菜单；从 './serviceWorker' 导入 * 作为 serviceWorker；从'./Block.js'导入块；ReactDOM.render(<div className="主容器"><菜单/><方块/></div>, document.getElementById('root'));//如果你想让你的应用离线工作和加载更快，你可以改变//unregister() 到 register() 下面.请注意，这带有一些陷阱.//了解更多关于服务工作者的信息:serviceWorker.unregister();

从'react'导入反应；导入'./Menu.css'；从'./Block.js'导入{blocksHandler}；类菜单扩展 React.Component {构造函数(道具){超级(道具)；this.state = {值:''};this.handleAdd = this.handleAdd.bind(this);}处理添加(事件){blocksHandler.add('lol');console.log(blocksHandler.render());}使成为() {返回 (<div className="菜单"><header className="菜单标题"><button className="Menu-button" onClick={this.handleAdd}>添加块</button></标题></div>);}}导出默认菜单；

从'react'导入反应；导入'./Block.css'；//此函数将组件添加到数组并返回它们让 blocksHandler = (function() {让块 = [];返回 {添加:功能(块){blocks.push(block);},渲染:函数(){返回块；}}})();类块扩展 React.Component {构造函数(道具){超级(道具)；这个.state = {标题: ''，内容: ''};this.handleChange = this.handleChange.bind(this);this.handleSubmit = this.handleSubmit.bind(this);}处理变化(事件){this.setState({[event.target.name]: event.target.value});}处理提交(事件){alert('提交了一个名字:' + this.state.title);event.preventDefault();}使成为() {返回 (<div className="块容器"><form onSubmit={this.handleSubmit}><div className="块标题"><标签>块标题:
{blocksHandler.render().map(i => (<区块键={i}/>))}</div>)}}导出默认块；导出 {blocksHandler};

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import Menu from './Menu';
import * as serviceWorker from './serviceWorker';
import Blocks from './Block.js';


ReactDOM.render(
    <div className="Main-container">
        <Menu />
        <Blocks />
    </div>
    , document.getElementById('root'));

// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers:
serviceWorker.unregister();

import React from 'react';
import './Menu.css';
import {blocksHandler} from './Block.js';

class Menu extends React.Component {

  constructor(props) {

    super(props);
    this.state = {value: ''};

    this.handleAdd = this.handleAdd.bind(this);

  }

  handleAdd(event) {
    blocksHandler.add('lol');
    console.log(blocksHandler.render());
  }

  render() {
    return (
      <div className="Menu">
        <header className="Menu-header">
          <button className="Menu-button" onClick={this.handleAdd}>Add block</button>
        </header>
      </div>
    );
  }
}

export default Menu;

import React from 'react';
import './Block.css';

// this function adds components to an array and returns them

let blocksHandler = (function() {
    let blocks = [];
    return {
        add: function(block) {
            blocks.push(block);
        },
        render: function() {
            return blocks;
        }
    }
})();

class Block extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            title: '',
            content: ''
        };

        this.handleChange = this.handleChange.bind(this);
        this.handleSubmit = this.handleSubmit.bind(this);
    }

    handleChange(event) {
        this.setState({[event.target.name]: event.target.value});
    }

    handleSubmit(event) {
        alert('A name was submitted: ' + this.state.title);
        event.preventDefault();
    }

    render() {
      return (
        <div className="Block-container">
            <form onSubmit={this.handleSubmit}>
            <div className="Block-title">
                <label>
                    Block title:
                    <input type="text" name="title" value={this.state.value} onChange={this.handleChange} />
                </label>
            </div>
            <div className="Block-content">
                <label>
                    Block content:
                    <input type="text" name="content" value={this.state.value} onChange={this.handleChange} />
                </label>
            </div>
            <input type="submit" value="Save" />
            </form>
        </div>
      );
    }
}

class Blocks extends React.Component {

    render() {
        return (
            <div>
                {blocksHandler.render().map(i => (
                    <Block key={i} />
                ))}
            </div>
        )
    }
}


export default Blocks;
export {blocksHandler};