React-APP搭建项目

React有三种安装的方式，想了解的登录React官网查看，今天介绍的一个自动安装的不需要怎么配置环境，自动生成的方式，类似于vue-cli！并实现一个小案例，留言功能！

官网的安装教程！

安装react-app

//依次安装
npm install -g create-react-app
create-react-app my-app

cd my-app
npm start

最终启动自后会出现一个Welcome React页面,
大家可以去试试.

下边我们配置一下项目结构

安装我们需要的loader

npm file-loader url url-loader --save-dev

配置webpack

rules: [
     {test: /\.js$/,exclude: /node_modules/,loader: "react-hot-loader!babel-loader"},{test: /\.css$/,loader: "style-loader!css-loader"},{ test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,loader: "file-loader" },{ test: /\.(woff|woff2)$/,loader:"url-loader?prefix=font/&limit=5000" },{ test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,loader: "url-loader?limit=10000&mimetype=application/octet-stream" },{ test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,loader: "url-loader?limit=10000&mimetype=image/svg+xml" }
  ]

复制之前的webpack.config.js文件

我们加以改造

module.exports = {
  entry: './index.js',output: {
    path:path.resolve(__dirname,"build"),publicPath:"/assets/",filename: 'bundle.js'
  },module: {
      rules: [
    { test: /\.js$/,loader: "react-hot-loader!babel-loader" },{ test: /\.css$/,loader: "style-loader!css-loader" },//添加
    { test: /\.(woff|woff2)$/,//添加
    { test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,//添加
    { test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,loader: "url-loader?limit=10000&mimetype=image/svg+xml" } //添加
      ]
    } 
}

导入我们之前的json文件

{
  "name": "myapp","version": "0.1.0","private": true,"dependencies": {
    "antd-mobile": "^1.5.0","react": "^15.6.1","react-dom": "^15.6.1","react-scripts": "1.0.10"
  },"scripts": {
    "start": "react-scripts start","build": "react-scripts build","test": "react-scripts test --env=jsdom","eject": "react-scripts eject"
  },"devDependencies": {
    "babel-plugin-import": "^1.2.1","node-sass": "^4.5.3","sass-loader": "^6.0.6"
  }
}

输入npm install补全我们的项目结构

npm install

引入bootstap模块

我们的bootstap是事先安装完成之后，把他移动到css项目目录下的，index配置如下

//入口文件index.js下
import React from 'react';
import ReactDOM from 'react-dom';
import LiuYanapp from './LiuYanapp';

import './bootstrap/css/bootstrap.min.css';  //引入样式文件
ReactDOM.render(<LiuYanapp/>,document.getElementById("app"));      //输出到页面

创建留言模板，并划分项目模块

import React from 'react';

import LiuYanList from './LiuYanList';
import LiuYanForm from './LiuYanForm';

class LiuYanapp extends React.Component{
    constructor(props){
        super(props);
        this.ids=1;
        this.state={
                todos:[]
        };
        
        this.addItem=this.addItem.bind(this);
        this.deleteItem=this.deleteItem.bind(this);
    }
    deleteItem(id){
        let newtodos=this.state.todos.filter((item)=>{
            return !(item.id==id)
        });
          this.setState({
            todos:newtodos
        });

    }

    addItem(value){
       this.state.todos.unshift(
            {
                id:this.ids++,text:value,time:(new Date()).toLocaleString(),done:0
            }
       )
        this.setState({
            todos:this.state.todos
        });   
    }

    render(){
        return (
            <div className="container">
                <br/>
                <br/>
                <br/>
                <br/>
                <div className="panel panel-default">
                    <div className="panel-headingbg-danger">
                         
                            <hr/>
                              
                    </div>
                    <div className="panel-body">           
                    
                             <h1 className="text-center ">留言板</h1>
                             <LiuYanList deleteItem={this.deleteItem} data={this.state.todos}/>
                             <LiuYanForm addItem={this.addItem}/> 
                    </div>
                </div> 
            </div>         
        );
    }
}

export default LiuYanapp;

创建LiuYanForm.js文件

import React from 'react';

class LiuYanForm extends React.Component{
   tijiao(event){
        event.preventDefault();
    }
    add(event){        
        if(event.type=="keyup"&&event.keyCode!=13){
            return false;
        }
        let txt=this.refs.txt.value;
        if(txt=="") return false;       
        this.props.addItem(txt);
        this.refs.txt.value="";
    }
    render(){
        return(
             <form className="form-horizontal" onSubmit={this.tijiao.bind(this)}>
                <div className="form-group">
                    <div className="col-sm-10">
                        <input ref="txt"  type="text" className="form-control" onKeyUp={this.add.bind(this)} id="exampleInputName2" placeholder="请输入留言内容"/>
                    </div>
                    <div className="col-sm-2">
                      <button type="button" className="btn btn-primary" onClick={this.add.bind(this)}>留言</button>
                    </div>               
                </div>           
            </form>
        );
    }
}
export default LiuYanForm;

创建LiuYanItem.js文件

import React from 'react';

class LiuYanItem extends React.Component{
    delete(){
        this.props.deleteItem(this.props.data.id);
    }
    render(){

        let {text,time,done,id}=this.props.data;

        return (
           <tr>
               <td>{text}
                   <br/>
                   <br/>
               {time}
               </td>
               <td>
                   <a className="btn glyphicon glyphicon-remove btn-danger" onClick={this.delete.bind(this)}>删除留言</a>
                </td>
           </tr>
        );
    }
}

export default LiuYanItem;

创建LiuYanList.js文件

import React from 'react';

import LiuYanItem from './LiuYanItem';
class LiuYanList extends React.Component{
    render(){
        let todos=this.props.data;
       
        let todoItems=todos.map(item=>{
            return <LiuYanItem deleteItem={this.props.deleteItem} key={item.id} data={item}/>
        });
        
        return (
            <table className="table table-striped">
                <thead>
                    <tr>
                        <th>留言</th>                       
                    </tr>
                </thead>
                <tbody>
                    {todoItems}
                </tbody>              
            </table>
        );
    }
}

export default LiuYanList;

这样我们的留言功能就创建完了，大家输入npm start就可以对项目进行启动！想了解的同学们可以复制回去实验一下！