Angular No模块工厂可用于依赖类型:ContextElementDependency

kom*_*ron 37 webpack angular-cli angular

ng build在我的Angular 4项目上运行会出现此错误:

     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 
Run Code Online (Sandbox Code Playgroud)

我已经在这个问题上阅读了关于github和stackoverflow的很多Q/A,但是没有对我有帮助.

正如答案所示,我已经删除了webpack,但这没有帮助.删除了node_modules,从package.json中删除了webpack,运行npm install,仍然没有帮助.清理了npm的缓存,从package.json中删除了webpack,运行npm install,仍然没有结果.许多其他类似的建议没有帮助.

当我从package.json中删除webpack并运行时,npm install我得到以下内容:

 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)
Run Code Online (Sandbox Code Playgroud)

当返回webpack到package.json,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
Run Code Online (Sandbox Code Playgroud)

这是项目的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"
  }
}
Run Code Online (Sandbox Code Playgroud)

当我在其他机器上克隆这个repo时,运行npm install然后ng build它没关系,工作正常,但是在我的上面它给出了这个错误.我试过完全从我的机器中取出回购,从无到有,运行克隆npm installng build,还是同样的错误.

有人可以告诉这个行为的原因是什么以及如何解决它?

kom*_*ron 73

如果有人遇到它,我会采取措施解决这个问题:

  1. Package.json:从DevDependencies中删除webpack
  2. rm -R node_modules (删除node_modules文件夹)
  3. npm i -g webpack
  4. npm i -g webpack-dev-server
  5. 删除package-lock.json(如果它在那里)
  6. npm i
  7. npm start

我仍然不完全理解为什么会这样.

  • 对我来说,我现在得到“错误:找不到模块'webpack'` (3认同)
  • 我越是遇到这个问题,我就越想得到这个答案...... (2认同)
  • 这个错误很愚蠢,但是很长一段时间没有人修复它,唯一的解决方法是全局安装webpack。 (2认同)

pha*_*cic 15

npm ls webpack

如果你看到两个版本webpack(在@ angular/cli下和根node_modules下),那就是问题所在.删除/重命名下的的WebPack @angular/cli和中.bin的文件夹中@angular/cli.

问题解决了我