webpack打包react项目的实现方法

webpack是目前最流行的打包工具之一,是一个为前端模块打包构建而生的工具,它既吸取了大量已有的方案优点和教训,也解决了很多前端开发过程中已有的痛点,如代码的拆分与异步加载,对非js资源的支持,强大的loader设计使得它更像是一个构建平台,而不是打包工具。

2webpack,react开发环境

1)新建一个项目文件夹,进入此文件夹,创建package.json文件(npm init命令)

2)确认已安装webpack,web pack-dev-server模块

3)安装babel(babel不懂的请先看https://www.jb51.net/article/142362.htm)babel的目的有两个(将es6转为es5,转换jsx语法),

4) 安装babel-preset-es2015和babel-preset-react

5)安装babel-loader和 babel-core

6)babel工作需要.babelrc文件

{ "presets":["react","es2015"] }

7)最重要的webpack.config.js文件的配置

var path = require('path'); var webpack = require('webpack'); var HtmlwebpackPlugin = require('html-webpack-plugin'); var ROOT_PATH = path.resolve(__dirname); var BUILD_PATH = path.resolve(ROOT_PATH, 'build'); var APP_PATH = path.resolve(ROOT_PATH, 'app'); module.exports = { entry: { app: path.resolve(APP_PATH, 'app.js') }, output: { path: BUILD_PATH, filename: '[name].bundle.js' }, resolve:{ extensions:['','.js','.jsx'], root:APP_PATH }, module:{ loaders:[ { test: /\.js?$/, loaders: ['babel-loader'], include: APP_PATH } ] }, plugins:[ new HtmlwebpackPlugin({ title: 'demo', filename:'index.html' }), ] }

这个应该是最简单的配置了,不懂的可以网上搜,其中用到HtmlwebpackPlugin,

这个插件是帮我们自动生成html页面,并自动引入打包后的.js文件,其中的参数意思是,title这个页面的title,filename生成的页面名字

8)最后的项目文件目录为

webpack打包react项目的实现方法

app是项目组件文件夹,test是测试文件

list.js代码

import React from 'react'; import uuid from 'uuid'; import ListItem from '../listItem/listItem'; class List extends React.Component { constructor(props) { super(props); this.state = { items: [] } } handleclick() { const value = this.refs.addlist.value; const str = { id: uuid.v1(), text: value } let items = this.state.items; items = [...items, str];//合并数值 this.setState({ items }) } //删除其中的 deleteItem(id) { this.setState({ items: this.state.items.filter( result => result.id !== id ), }); } render() { const ListIt = this.state.items.map(item => { return ( <ListItem key={item.id} name={item} onDelete={this.deleteItem.bind(this)} /> ); }); return ( <div className="list"> <input type="text" placeholder="请输入" ref="addlist" /> <button className="addbutton" onClick={this.handleclick.bind(this)}>添加值</button> <ul> {ListIt} </ul> </div> ); } } export default List;

listitem.js

import React from 'react'; class ListItem extends React.Component { render() { const text = this.props.name; return ( <li onClick={() => this.props.onDelete(text.id)}> <span>{text.text}</span> </li> ) } } export default ListItem;

app.js文件

import React from 'react'; import ReactDOM from 'react-dom'; import List from './list/list'; const app = document.createElement('div'); document.body.appendChild(app); ReactDOM.render(<List />, app);

9)最后的package.json文件

{ "name": "csdndemo", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "dev": "webpack-dev-server --hot" }, "author": "", "license": "ISC", "devDependencies": { "babel-core": "^6.24.0", "babel-loader": "^6.4.1", "babel-preset-es2015": "^6.24.0", "babel-preset-react": "^6.23.0", "html-webpack-plugin": "^2.28.0", "react": "^15.4.2", "react-dom": "^15.4.2", "webpack": "^1.14.0", "webpack-dev-server": "^1.14.1" } }

运行项目nam run dev

10)后续会有基于这个demo的测试enzyme库的使用,代码检测aslant,flux的使用,redux的使用

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