webpack打包react项目的实现方法

网络编程 2024/12/23 佚名

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1webpack简介

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"text-align: center">
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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。