详解用webpack2搭建angular2的项目

使用Webpack 2搭建Angular 2项目在本文中，我们将详细介绍如何使用Webpack 2搭建Angular 2项目。我们将从零开始，逐步构建一个完整的Angular 2项目，并学习如何使用Webpack 2来管理和优化我们的项目。 Webpack 2简介Webpack 2是一个流行的JavaScript模块打包工具，用于将多个JavaScript文件合并成一个文件，以便于在浏览器中加载。这使得我们可以使用ES6语法、 CommonJS模块和其他高级功能来开发我们的应用程序。 Angular 2简介Angular 2是一个基于JavaScript的前端框架，用于构建复杂的Web应用程序。它提供了一个强大的依赖注入系统、模板语言和许多其他功能，以便于快速构建高质量的应用程序。搭建Angular 2项目我们需要安装Angular 2的依赖项。我们可以使用npm来安装这些依赖项： ``` npm install @angular/common @angular/compiler @angular/core @angular/forms @angular/http @angular/platform-browser-dynamic @angular/router core-js es6-shim reflect-metadata rxjs zone.js ```接下来，我们需要创建一个package.json文件，其中包含我们的项目信息： ``` { "name": "angular-webpack", "version": "1.0.0", "description": "webpack2 & angular2", "scripts": { "dev": "babel-node ./src/config/dev.js" }, "author": "Travis Lee", "license": "ISC", "dependencies": { "@angular/common": "~4.0.0", "@angular/compiler": "~4.0.0", "@angular/core": "~4.0.0", "@angular/forms": "~4.0.0", "@angular/http": "~4.0.0", "@angular/platform-browser-dynamic": "~4.0.0", "@angular/router": "~4.0.0", "core-js": "^2.4.1", "es6-shim": "^0.35.3", "reflect-metadata": "^0.1.8", "rxjs": "5.0.1", "zone.js": "^0.8.4" }, "devDependencies": { "babel-core": "^6.25.0", "babel-loader": "^7.1.0", "babel-preset-es2015": "^6.24.1", "clean-webpack-plugin": "^0.1.16", "css-loader": "^0.28.4", "extract-text-webpack-plugin": "^2.1.2", "path": "^0.12.7", "style-loader": "^0.18.2", "ts-loader": "^2.1.0", "typescript": "^2.3.4", "typings": "^2.1.1", "uglifyjs-webpack-plugin": "^0.4.6", "webpack": "^2.6.1", "webpack-dev-server": "^2.5.0", "webpack-merge": "^4.1.0" } } ``` Webpack配置文件接下来，我们需要创建一个Webpack配置文件，用于配置我们的项目。以下是一个基本的Webpack配置文件： ``` import path from 'path' import config from "./webpack.config" import merge from "webpack-merge" import webpack from "webpack" import webpackDevServer from "webpack-dev-server" import { format } from 'util' let PORT = 1699; let PUBLIC_PATH = "http://localhost:" + PORT + "/"; let webpackConifg = merge(config, { devtool: "source-map", entry: { main: [ format("webpack-dev-server/client?%s", PUBLIC_PATH), "webpack/hot/dev-server", "./src/main.ts" ] }, output: { path: path.resolve(__dirname, '../dist'), publicPath: PUBLIC_PATH, filename: '[name].js' }, plugins: [ new webpack.HotModuleReplacementPlugin() ] }) const compiler = webpack(webpackConifg); new webpackDevServer(compiler, { inline: true, hot: true }) ```这个配置文件告诉Webpack如何将我们的代码合并成一个文件，并提供了热更新功能，以便于我们在开发过程中快速看到变化。总结在本文中，我们学习了如何使用Webpack 2搭建Angular 2项目。我们创建了一个基本的Angular 2项目，安装了所需的依赖项，并创建了一个基本的Webpack配置文件，以便于管理和优化我们的项目。