TLDR:Aurelia 应用程序与 webpack 捆绑在一起，无法在浏览器中加载 - 控制台显示错误:can't find module with id: main 。我认为这意味着它找不到入口点。没有什么可以尝试的了。

我正在开发 Aurelia 应用程序。
我们使用 webpack 来捆绑我们的前端代码。
直到过去几天，一切都进展顺利。 (最近我们添加了 aurelia-dialog，它运行良好，但我们必须进行一些 npm 更新才能使其正常工作，等等。)
有几个 npm 依赖问题需要解决，但我最终解决了......
一个特别令人烦恼的是 gulp 曾经作为 "gulp": "github:gulpjs/gulp#4.0 包含在我们的 package.json 中。但我猜 git 分支被删除了，所以在这个问题和其他 npm 问题之间，它们都需要更新到 "gulp": "4.0"这很令人寒心 - 除此之外，它还导致我们不得不开始一长串可怕的 npm 依赖解决方案。
但是现在，我陷入了这样的境地:npm 包没有错误，webpack 编译过程没有错误，也没有任何 tslint 错误。但是，该应用程序已损坏，甚至在其他未触及的分支中也存在问题。

错误是:

Error: Unable to find module with ID: main

at WebpackLoader. (https://localhost:44399/dist/app.bundle.js?v=18.11.05&v=QnXnhS1zNjvTNWq1CN7QzBCr2ti1BVIVEjGB_ewbuj0:9435:35)

at step (https://localhost:44399/dist/app.bundle.js?v=18.11.05&v=QnXnhS1zNjvTNWq1CN7QzBCr2ti1BVIVEjGB_ewbuj0:9296:23)

如果我理解正确(我不是设置此应用程序的开发人员，而且他已经不在了)，则错误中引用的“main”来自 aurelia-app="main" <body> 内的属性wwwroot/dist/index.html 中的元素:

(目录结构见底部)

index.html

<html>
  <head>
    <meta charset="utf-8">
    <title>Aurelia Navigation Skeleton</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <base href="/">
    <!-- imported CSS are concatenated and added automatically -->
  </head>
  <body aurelia-app="main">

  <script type="text/javascript" src="/app.bundle.js"></script><script type="text/javascript" src="/vendor.bundle.js"></script></body>
</html>

值“main”，我相信应该引用src/main.ts :

(我尝试将其更改为: main.ts 、 src/main.ts 、 src/main 、 ../../src/main.ts 等 - 它们都不起作用，甚至没有更改错误消息，这让我觉得这不是寻找正确的地方。)

main.ts

// we want font-awesome to load as soon as possible to show the fa-spinner
import {Aurelia} from 'aurelia-framework'
import environment from './environment';
import {PLATFORM} from 'aurelia-pal';
import * as Bluebird from 'bluebird';

// remove if you don't want a Promise polyfill (remove also from webpack.config.js)
Bluebird.config({ warnings: { wForgottenReturn: false } });

export function configure(aurelia: Aurelia) {
    aurelia.use
        .standardConfiguration()
        .plugin(PLATFORM.moduleName('aurelia-dialog'))
    //.feature(PLATFORM.moduleName('resources/index'))
    //.plugin(PLATFORM.moduleName('aurelia-ui-virtualization')) 
    .globalResources(
        [
            //Converters
            PLATFORM.moduleName('converters/decimal-format'), 
            PLATFORM.moduleName('converters/unit-selection-format'), 
            PLATFORM.moduleName('converters/sort'), 
            PLATFORM.moduleName('converters/date-format'),

            //Custom Element Registrations
            //base-level components (standalone)
            //PLATFORM.moduleName('components/custom-elements/table-cell-text-element'),
            PLATFORM.moduleName('components/custom-elements/text-div-element'),
            PLATFORM.moduleName('components/custom-elements/icon-button-element'),
            PLATFORM.moduleName('components/custom-elements/checkbox-div-element'),
            PLATFORM.moduleName('components/custom-elements/range-selector-element'),
            PLATFORM.moduleName('components/custom-elements/unit-selector-element'),

            //mid-level components (groupings/dependent on others)
            PLATFORM.moduleName('components/custom-elements/content-header-element'),
            PLATFORM.moduleName('components/custom-elements/table-configurable-element'),
            PLATFORM.moduleName('components/custom-elements/table-tiered-element'),
            PLATFORM.moduleName('components/custom-elements/grid-selector-element'),

            //high-level components (groups of mid-level)
            PLATFORM.moduleName('components/custom-elements/grid-selector-group-element'),
            PLATFORM.moduleName('components/custom-elements/dropdown-select-element'),
            PLATFORM.moduleName('components/custom-elements/alert-element'),

            //Rate Components 
            PLATFORM.moduleName('components/custom-elements/base-charge-element'),
            PLATFORM.moduleName('components/custom-elements/tiered-rate-element'),
            PLATFORM.moduleName('components/custom-elements/tiered-per-unit-charge-element'),
            PLATFORM.moduleName('components/custom-elements/rate-component-element'),
            PLATFORM.moduleName('components/custom-elements/meter-charge-element')
        ]);


  // Uncomment the line below to enable animation.
  // aurelia.use.plugin(PLATFORM.moduleName('aurelia-animator-css'));
  // if the css animator is enabled, add swap-order="after" to all router-view elements

  // Anyone wanting to use HTMLImports to load views, will need to install the following plugin.
  // aurelia.use.plugin(PLATFORM.moduleName('aurelia-html-import-template-loader'));

  if (environment.debug) {
    aurelia.use.developmentLogging();
  }

  if (environment.testing) {
    aurelia.use.plugin(PLATFORM.moduleName('aurelia-testing'));
    }



  aurelia.start().then(() => {aurelia.setRoot(PLATFORM.moduleName('app'))});
}

我相当确定，这没有任何问题 - 因为它在上周末运行良好，此后一直没有改变。

值得注意的是，我们更改了 webpack.config.js 中的 ModuleDependencyPlugin 部分。我们添加了一个条目:"aurelia-dialog": ['./aurelia-dialog', './ux-dialog-header', './ux-dialog-body', -dialog-footer', './attach-focus']这是从 aurelia-dialog 加载自定义组件所必需的(见下文)。此更改最初并未破坏该应用程序。我想说，大约一周以来，它运行良好？

webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const project = require('./aurelia_project/aurelia.json');
const { AureliaPlugin, ModuleDependenciesPlugin } = require('aurelia-webpack-plugin');
const { ProvidePlugin } = require('webpack');
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');

// config helpers:
const ensureArray = (config) => config && (Array.isArray(config) ? config : [config]) || [];
const when = (condition, config, negativeConfig) =>
  condition ? ensureArray(config) : ensureArray(negativeConfig);

// primary config:
const title = 'Aurelia Navigation Skeleton';
const outDir = path.resolve(__dirname, 'wwwroot/dist');
const srcDir = path.resolve(__dirname, 'src');
const nodeModulesDir = path.resolve(__dirname, 'node_modules');
const baseUrl = '/';

const cssRules = [
  { loader: 'css-loader' },
];

module.exports = ({production, server, extractCss, coverage, analyze} = {}) => ({
  resolve: {
    extensions: ['.ts', '.js'],
    modules: [srcDir, 'node_modules'],
  },
  entry: {
    app: ['aurelia-bootstrapper'],
    vendor: ['bluebird'],
  },
  mode: production ? 'production' : 'development',
  output: {
    path: outDir,
    publicPath: baseUrl,
    filename: production ? '[name].[chunkhash].bundle.js' : '[name].bundle.js',
    sourceMapFilename: production ? '[name].[chunkhash].bundle.map' : '[name].bundle.map',
    chunkFilename: production ? '[name].[chunkhash].chunk.js' : '[name].chunk.js'
  },
  performance: { hints: false },
  devServer: {
    contentBase: outDir,
    // serve index.html for all 404 (required for push-state)
    historyApiFallback: true
  },
  devtool: 'source-map',
  module: {
    rules: [
      // CSS required in JS/TS files should use the style-loader that auto-injects it into the website
      // only when the issuer is a .js/.ts file, so the loaders are not applied inside html templates
      {
        test: /\.css$/i,
        issuer: [{ not: [{ test: /\.html$/i }] }],
        use: extractCss ? ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: cssRules
        }) : ['style-loader', ...cssRules],
      },
      {
        test: /\.css$/i,
        issuer: [{ test: /\.html$/i }],
        // CSS required in templates cannot be extracted safely
        // because Aurelia would try to require it again in runtime
        use: cssRules
      },
      {test: /\.js\.map$/,  loader: 'ignore-loader' },
      {test: /\.ts\.orig$/,  loader: 'ignore-loader' },
      {test: /\.html\.orig$/,  loader: 'ignore-loader' },
      {test: /\.tst$/,  loader: 'ignore-loader' },
      { test: /\.html$/i, loader: 'html-loader' },
      { test: /\.tsx?$/, loader: "ts-loader" },
      //{ test: /\.json$/i, loader: 'json-loader' },
      // use Bluebird as the global Promise implementation:
      { test: /[\/\\]node_modules[\/\\]bluebird[\/\\].+\.js$/, loader: 'expose-loader?Promise' },
      // embed small images and fonts as Data Urls and larger ones as files:
      { test: /\.(png|gif|jpg|cur)$/i, loader: 'url-loader', options: { limit: 8192 } },
      { test: /\.woff2(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'url-loader', options: { limit: 10000, mimetype: 'application/font-woff2' } },
      { test: /\.woff(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'url-loader', options: { limit: 10000, mimetype: 'application/font-woff' } },
      // load these fonts normally, as files:
      { test: /\.(ttf|eot|svg|otf)(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'file-loader' },
      ...when(coverage, {
        test: /\.[jt]s$/i, loader: 'istanbul-instrumenter-loader',
        include: srcDir, exclude: [/\.{spec,test}\.[jt]s$/i],
        enforce: 'post', options: { esModules: true },
      })
    ]
  },
    plugins: [
        //new AureliaWebpackPlugin({
        //    includeSubModules: [{
        //        moduleId: 'aurelia-dialog'
        //    },
        //    ],
        //    contextMap: {
        //        'aurelia-dialog': 'node_modules/aurelia-dialog/dist/commonjs/aurelia-dialog.js'
        //    }
        //}),
    new AureliaPlugin({includeAll: "src"}),
    new ProvidePlugin({
      'Promise': 'bluebird'
    }),
    new ModuleDependenciesPlugin({
        'aurelia-testing': ['./compile-spy', './view-spy'],
        "aurelia-dialog": ['./aurelia-dialog', './ux-dialog-header', './ux-dialog-body',
            './ux-dialog-footer', './attach-focus']
    }),
    new HtmlWebpackPlugin({
      template: 'index.ejs',
      minify: production ? {
        removeComments: true,
        collapseWhitespace: true
      } : undefined,
      metadata: {
        // available in index.ejs //
        title, server, baseUrl
      }
    }),
    ...when(extractCss, new ExtractTextPlugin({
      filename: production ? '[contenthash].css' : '[id].css',
      allChunks: true
    })),
    ...when(production, new CopyWebpackPlugin([
      { from: 'static/favicon.ico', to: 'favicon.ico' }])),
    ...when(analyze, new BundleAnalyzerPlugin())
  ]
});

package.json

{
  "name": "webui",
  "description": "An Aurelia client application.",
  "version": "0.1.0",
  "repository": {
    "type": "???",
    "url": "???"
  },
  "license": "MIT",
  "dependencies": {
    "@types/plotly.js": "^1.38.3",
    "aurelia-animator-css": "^1.0.4",
    "aurelia-bootstrapper": "^2.2.0",
    "aurelia-dialog": "^1.1.0",
    "aurelia-polyfills": "^1.3.0",
    "bluebird": "^3.5.1",
    "core-decorators": "^0.2.0",
    "lit-html": "^1.0.0"
  },
  "peerDependencies": {},
  "devDependencies": {
    "@types/bootstrap": "^4.1.2",
    "@types/jest": "^22.2.0",
    "@types/lodash": "^4.14.105",
    "@types/node": "^9.6.23",
    "@types/pikaday": "^1.6.3",
    "@types/webpack": "^4.1.1",
    "ajv": "^6.0.0",
    "aspnet-webpack": "^2.0.3",
    "aurelia-cli": "^0.35.1",
    "aurelia-loader-nodejs": "^1.0.1",
    "aurelia-pal-nodejs": "^1.0.0-beta.3.2.0",
    "aurelia-protractor-plugin": "^1.0.6",
    "aurelia-testing": "^1.0.0-beta.4.0.0",
    "aurelia-tools": "^2.0.0",
    "aurelia-webpack-plugin": "^3.0.0-rc.1",
    "clean-webpack-plugin": "^0.1.19",
    "copy-webpack-plugin": "^4.5.1",
    "core-js": "^2.5.7",
    "css-loader": "^0.28.11",
    "cypress": "^3.1.0",
    "d3": "^5.1.0",
    "del": "^3.0.0",
    "dropzone": "^5.4.0",
    "expose-loader": "^0.7.5",
    "extract-text-webpack-plugin": "^3.0.2",
    "file-loader": "^1.1.11",
    "gulp": "4.0",
    "gulp-rename": "^1.2.2",
    "gulp-util": "^3.0.8",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.0.6",
    "ignore-loader": "^0.1.2",
    "intro.js": "^2.9.3",
    "istanbul-instrumenter-loader": "^3.0.0",
    "iterall": "^1.2.2",
    "jest": "^22.4.2",
    "jest-cli": "^23.0.0-alpha.0",
    "jquery": "^3.3.1",
    "jquery-sparkline": "^2.4.0",
    "json-loader": "^0.5.7",
    "minimatch": "^3.0.4",
    "nouislider": "^11.1.0",
    "nps": "^5.8.2",
    "nps-utils": "^1.5.0",
    "numeral": "^2.0.6",
    "opn": "^5.3.0",
    "pikaday": "^1.7.0",
    "plotly.js": "^1.44.2",
    "protractor": "^5.3.0",
    "style-loader": "^0.20.3",
    "through2": "^2.0.3",
    "tinymce": "^4.7.11",
    "ts-jest": "^22.4.1",
    "ts-loader": "^4.0.1",
    "ts-node": "^5.0.1",
    "typescript": "^2.7.2",
    "uglify-js": "^3.3.15",
    "url-loader": "^1.0.1",
    "vinyl-fs": "^3.0.2",
    "wait-on": "^2.1.0",
    "webpack": "^4.29.3",
    "webpack-bundle-analyzer": "latest",
    "webpack-cli": "^3.1.1",
    "webpack-dev-server": "^3.1.14",
    "webpack-hot-middleware": "^2.21.2",
    "wnumb": "^1.1.0",
    "wormhole.js": "^0.10.1"
  },
  "jest": {
    "modulePaths": [
      "<rootDir>/src",
      "<rootDir>/node_modules"
    ],
    "moduleFileExtensions": [
      "js",
      "json",
      "ts"
    ],
    "transform": {
      "^.+\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
    },
    "testRegex": "\\.spec\\.(ts|js)x?$",
    "setupFiles": [
      "<rootDir>/test/jest-pretest.ts"
    ],
    "testEnvironment": "node",
    "collectCoverage": true,
    "collectCoverageFrom": [
      "src/**/*.{js,ts}",
      "!**/*.spec.{js,ts}",
      "!**/node_modules/**",
      "!**/test/**"
    ],
    "coverageDirectory": "<rootDir>/test/coverage-jest",
    "coverageReporters": [
      "json",
      "lcov",
      "text",
      "html"
    ]
  },
  "engines": {
    "node": ">= 6.0.0"
  },
  "scripts": {
    "build": "webpack",
    "start": "nps",
    "test": "nps test",
    "webpack-watch": "webpack --watch --info-verbosity verbose",
    "webpack-display-errors": "webpack --display-error-details",
    "compile": "tsc -w",
    "compile-tests": "tsc -p cypress  -w"
  },
  "main": "dist/app.bundle.js",
  "-vs-binding": {
    "ProjectOpened": [
      "compile-tests",
      "compile",
      "webpack-watch"
    ]
  }
}

aurelia.json

  "name": "WebUIFinal",
  "type": "project:application",
  "bundler": {
    "id": "webpack",
    "displayName": "Webpack"
  },
  "build": {
    "options": {
      "server": "dev",
      "extractCss": "prod",
      "coverage": false
    }
  },
  "platform": {
    "id": "aspnetcore",
    "displayName": "ASP.NET Core",
    "port": 8080,
    "hmr": false,
    "open": false,
    "output": "wwwroot/dist"
  },
  "loader": {
    "id": "none",
    "displayName": "None"
  },
  "transpiler": {
    "id": "typescript",
    "displayName": "TypeScript",
    "fileExtension": ".ts"
  },
  "markupProcessor": {
    "id": "minimum",
    "displayName": "Minimal Minification",
    "fileExtension": ".html"
  },
  "cssProcessor": {
    "id": "none",
    "displayName": "None",
    "fileExtension": ".css"
  },
  "editor": {
    "id": "none",
    "displayName": "None"
  },
  "unitTestRunner": [
    {
      "id": "jest",
      "displayName": "Jest"
    }
  ],
  "integrationTestRunner": {
    "id": "protractor",
    "displayName": "Protractor"
  },
  "paths": {
    "root": "src",
    "resources": "resources",
    "elements": "resources/elements",
    "attributes": "resources/attributes",
    "valueConverters": "resources/value-converters",
    "bindingBehaviors": "resources/binding-behaviors"
  },
  "testFramework": {
    "id": "jasmine",
    "displayName": "Jasmine"
  }
}

我和我的同事在过去的几天里都在努力解决这个问题 - 所以我们非常感谢您的帮助。

我尝试重置所有更改(包括返回到添加 aurelia-dialog 之前)，尝试更改 aurelia-app 属性的值。清理和重建几次。重新启动计算。重新克隆存储库....

目录结构为

WebUIFinal/
├── wwwroot/
│   └── dist/
│        ├── index.html
│        ├── 0.chunk.js
│        ├── ...
│        ├── vendor.bundle.js
│        └── app.bundle.js
├── aurelia-project/
│   └── aurelia.json
├── src/
│   ├── app.ts
│   └── main.ts
├── package.json
└── webpack.config.js
(plus a bunch of other stuff, of course -- this is just what I deemed relevant)

最佳答案

编辑:

调试 session 后，通过将 Webpack AureliaPlugin 更改为其最简单的形式，可以轻松解决模块 ID:main 未找到的问题:

plugins: [
  new AureliaPlugin()
]

由于构建的代码是Webpack可以轻松理解的格式，因此不需要任何配置。

而且，调试起来会更容易。如果 main 中的 configure 函数包含在 try catch 或 Promise 的 catch(ex =>) 中，这样您就可以看到出现的任何问题，而不是默默地失败和永远的加载屏幕。

使用最新版本的dialog，您不必再手动包含dialog的ModuleDependencyPlugin，因为它使用动态导入API，Webpack自然可以理解这一点。因此，我建议返回到原来的配置，并删除该配置。

new ModuleDependenciesPlugin({
    'aurelia-testing': ['./compile-spy', './view-spy'],
    // "aurelia-dialog": ['./aurelia-dialog', './ux-dialog-header', './ux-dialog-body', './ux-dialog-footer', './attach-focus']
})

关于javascript - Webpack:无法找到 ID 为 main 的模块 --(Aurelia 应用程序)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54660423/

javascript - Webpack:无法找到 ID 为 main 的模块 --(Aurelia 应用程序)

index.html

main.ts

webpack.config.js

package.json

aurelia.json

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