使用 webpack 导入 angularjs 的最佳实践是什么？

Question

你如何一起使用 Webpack 和 AngularJS，模板加载和资源的按需获取如何？

非常感谢为此目的编写的 webpack.config.js 文件的示例。

此处显示的所有代码 sn-ps 都可以通过this github repo 访问。代码大量改编自this packetloop git repo。

webpack.config.json

var path = require('path');
var ResolverPlugin = require("webpack/lib/ResolverPlugin");

var config = {
  context: __dirname,
  entry: ['webpack/hot/dev-server', './app/app.js'],
  output: {
    path: './build',
    filename: 'bundle.js'
  },
  module: {
    loaders: [{
      test: /\.css$/,
      loader: "style!css-loader"
    }, {
      test: /\.scss$/,
      loader: "style!css!sass?outputStyle=expanded"
    }, {
      test: /\.jpe?g$|\.gif$|\.png$|\.svg$|\.woff$|\.ttf$/,
      loader: "file"
    }, {
      test: /\.html$/,
      loader: "ngtemplate?relativeTo=" + path.join(__dirname, 'app/') + "!raw"
    }]
  },
  // Let webpack know where the module folders are for bower and node_modules
  // This lets you write things like - require('bower/<plugin>') anywhere in your code base
  resolve: {
    modulesDirectories: ['node_modules', 'lib/bower_components'],
    alias: {
      'npm': __dirname + '/node_modules',
      'vendor': __dirname + '/app/vendor/',
      'bower': __dirname + '/lib/bower_components'
    }
  },
  plugins: [
    // This is to help webpack know that it has to load the js file in bower.json#main
    new ResolverPlugin(
      new ResolverPlugin.DirectoryDescriptionFilePlugin("bower.json", ["main"])
    )
  ]
};

module.exports = config;

要将 AngularJS 导入主 app.js，请执行以下操作：

app/vendor/angular.js

'use strict';

if (!global.window.angular) {
  require('bower/angular/angular');
}
var angular = global.window.angular;
module.exports = angular;

然后像这样在app.js中使用，

app.js

...
var angular = require('vendor/angular');

// Declare app level module
var app = angular.module('myApp', []);

...

下面的说法正确吗？有没有更简单的方法来做到这一点？我看过一些（以任何标准衡量都不是很多）帖子，其中列出了另一种方法。

来自this reddit post comment

// Add to webpack.config.js#module#loaders array
    {
      test: /[\/]angular\.js$/,
      loader: "exports?angular"
    }

还有另一个插件正在开发中，地址为stackfull/angular-seed。看起来方向是对的，但现在真的很难用。

Webpack 非常棒，但缺乏文档和示例正在扼杀它。

Answer 1

您可以在需要它的所有模块（文件）中只需要 angular。我有一个 github repository 示例如何做到这一点（也使用 webpack 进行构建）。在示例中使用了 ES6 导入语法，但没关系，您可以改用标准的 require()。

例子：

import 'bootstrap/dist/css/bootstrap.min.css';
import './app.css';

import bootstrap from 'bootstrap';

import angular from 'angular';
import uirouter from 'angular-ui-router';

import { routing} from './app.config';

import common from './common/common.module';

import featureA from './feature-a/feature-a.module';
import featureB from './feature-b/feature-b.module';

const app = angular
    .module('app', [uirouter, common, featureA, featureB])
    .config(routing);

Answer 2

我从Angular + Flux 和Webpack 开始，所以我可以帮助你做一些事情。

基本上我用NPM 安装所有东西，它有module export 系统，所以它什么都没有。 （你可以使用export-loader，但如果你不需要，为什么。）

我的 webpack.config.js 看起来像这样：

var webpack           = require('webpack');
var path              = require('path');
var HtmlWebpackPlugin = require("html-webpack-plugin");

var nodeModulesDir = path.resolve(__dirname, './node_modules');

// Some of my dependencies that I want
// to skip from building in DEV environment
var deps = [
  'angular/angular.min.js',
  ...
];

var config = {
  context: path.resolve(__dirname, './app'),

  entry: ['webpack/hot/dev-server', './main.js'],

  resolve: {
    alias: {}
  },

  output: {
    path: path.resolve(__dirname, './build'),
    filename: 'bundle.js'
  },

  // This one I am using to define test dependencies
  // directly in the modules
  plugins: [
    new webpack.DefinePlugin({
      ON_TEST: process.env.NODE_ENV === 'test'
    })
  ],

  module: {
    preLoaders: [
      {test: /\.coffee$/, loader: "coffeelint", exclude: [nodeModulesDir]}
    ],
    loaders: [
      {test: /\.js$/, loader: 'ng-annotate', exclude: [nodeModulesDir]},
      {test: /\.coffee$/, loader: 'coffee', exclude: [nodeModulesDir]},
        ...
    ],
    noParse: []
  },

  devtool: 'source-map'
};

if (process.env.NODE_ENV === 'production') {
  config.entry = {
    app: path.resolve(__dirname, './app/main.js'),
     vendors: ['angular']
  };
  // config.output.path = path.resolve(__dirname, './dist');
 config.output = {
   path: path.resolve(__dirname, "./dist"),
  filename: "app.[hash].js",
  hash: true
 };
 config.plugins.push(new webpack.optimize.UglifyJsPlugin());
 config.plugins.push(new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.[hash].js'));
 config.plugins.push(new HtmlWebpackPlugin({
   title: 'myApp',
   template: path.resolve(__dirname, './app/index.html'),
   inject: 'body'
 }));

 delete config.devtool;


}
  else {
    deps.forEach(function (dep) {
      var depPath = path.resolve(nodeModulesDir, dep);
      config.resolve.alias[dep.split(path.sep)[0]] = depPath;
      config.module.noParse.push(depPath);
    });
  }
module.exports = config;

我的 ma​​in.js 看起来像这样：

var angular = require('angular');

if(ON_TEST) {
  require('angular-mocks/angular-mocks');
}

require('./index.coffee');

并且index.coffee包含主要的角度模块：

ngModule = angular.module 'myApp', []

require('./directive/example.coffee')(ngModule)