【发布时间】：2018-03-30 07:05:00
【问题描述】：
在我的 Angular 4 项目上运行 ng build 会出现此错误：
14% building modules 40/46 modules 6 active ...es\@angular\http\@angular\http.es5.js
An error occured during the build:
Error: No module factory available for dependency type: ContextElementDependency
at Compilation.addModuleDependencies (D:\dev\workspace\rep\node_modules\@angular\cli\node_modules\webpack\lib\Compilation.js:213:21)
at Compilation.processModuleDependencies (D:\dev\workspace\rep\node_modules\@angular\cli\node_modules\webpack\lib\Compilation.js:202:8)
at _this.buildModule.err (D:\dev\workspace\rep\node_modules\@angular\cli\node_modules\webpack\lib\Compilation.js:350:14)
at building.forEach.cb (D:\dev\workspace\rep\node_modules\@angular\cli\node_modules\webpack\lib\Compilation.js:147:27)
at Array.forEach (native)
at callback
我在 github 和 stackoverflow 上阅读了很多关于这个问题的 Q/A，但没有一个对我有帮助。
正如答案所暗示的，我已经删除了 webpack，但这并没有帮助。删除了 node_modules，从 package.json 中删除了 webpack，运行 npm install，仍然没有帮助。清理 npm 缓存，从 package.json 中删除 webpack，运行npm install，仍然没有结果。许多其他类似的建议也无济于事。
当我从 package.json 中删除 webpack 并运行 npm install 时，我得到以下信息：
Cannot find module 'webpack/lib/node/NodeTemplatePlugin' Error: Cannot
find module 'webpack/lib/node/NodeTemplatePlugin'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (D:\dev\workspace\rep\node_modules\html-webpack-plugin\lib\compiler.js:11:26)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (D:\dev\workspace\rep\node_modules\html-webpack-plugin\index.js:7:21)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
当将 webpack 返回到 package.json 时，运行 npm install 然后运行 npm list webpack 我得到以下结果：
+-- @angular/cli@1.4.7
| `-- webpack@3.6.0
`-- webpack@3.8.1
这里是项目的package.json：
{
"name": "somename",
"version": "1.0.0",
"description": "",
"author": "",
"url": "",
"copyright": "somec",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/common": "^4.4.5",
"@angular/compiler": "^4.4.5",
"@angular/core": "^4.4.5",
"@angular/forms": "^4.4.5",
"@angular/http": "^4.4.5",
"@angular/platform-browser": "^4.4.5",
"@angular/platform-browser-dynamic": "^4.4.5",
"@angular/router": "^4.4.5",
"@angular/upgrade": "^4.4.5",
"amazon-cognito-identity-js": "^1.21.0",
"chart.js": "2.7.0",
"core-js": "2.5.1",
"font-awesome": "^4.7.0",
"jquery": "^3.2.1",
"moment": "2.18.1",
"ng2-charts": "1.6.0",
"ngx-bootstrap": "1.9.3",
"raw-loader": "^0.5.1",
"rxjs": "5.4.3",
"simple-line-icons": "^2.4.1",
"ts-helpers": "1.1.2",
"zone.js": "0.8.17"
},
"devDependencies": {
"@angular/cli": "^1.4.7",
"@angular/compiler-cli": "^4.4.5",
"@types/jasmine": "2.6.0",
"@types/jquery": "^3.2.13",
"@types/node": "8.0.28",
"codelyzer": "3.2.0",
"jasmine-core": "2.8.0",
"jasmine-spec-reporter": "4.2.1",
"karma": "1.7.1",
"karma-chrome-launcher": "2.2.0",
"karma-cli": "1.0.1",
"karma-coverage-istanbul-reporter": "1.3.0",
"karma-jasmine": "1.1.0",
"karma-jasmine-html-reporter": "0.2.2",
"node-sass": "^4.5.3",
"postcss-loader": "^2.0.6",
"protractor": "5.1.2",
"sass-loader": "^6.0.6",
"ts-node": "3.3.0",
"tslint": "5.7.0",
"typescript": "2.5.2",
"webpack": "^3.6.0"
},
"engines": {
"node": ">= 6.9.0",
"npm": ">= 3.0.0"
}
}
当我在其他机器上克隆这个 repo 时，运行 npm install 然后运行 ng build 没关系，工作正常，但在我的它给出了这个错误。我已经尝试从我的机器上完全删除 repo，从头开始克隆并运行 npm install 和 ng build，仍然是同样的错误。
谁能告诉我这种行为的原因以及如何解决它？
【问题讨论】：
标签： angular webpack angular-cli