Angular 8 - ng build prod 在 ng serve 工作时显示错误 - 模块导入的意外值“未定义”

Posted 2023-03-15

【中文标题】Angular 8 - ng build prod 在 ng serve 工作时显示错误 - 模块导入的意外值“未定义”

【英文标题】：Angular 8 - ng build prod shows errors while ng serve works - Unexpected value 'undefined' imported by the module

【发布时间】：2020-01-26 04:37:44

【问题描述】：

我的应用程序在使用ng serve 时构建和运行良好，但在使用ng build --prod 时显示错误。该错误位于/node_modules/ 下的依赖项中，因此不确定如何解决？

错误信息：

ERROR in Unexpected value 'undefined' imported by the module 'ExampleModule in /Users/Projects/KagiDocs/git/core/node_modules/@angular/material-examples/examples_public_index.d.ts'

package.json

...
"private": true,
"dependencies": 
  "@angular/animations": "^8.0.0",
  "@angular/cdk": "^8.1.4",
  "@angular/cdk-experimental": "^8.1.1",
  "@angular/common": "^8.0.0",
  "@angular/compiler": "^8.0.0",
  "@angular/core": "^8.0.0",
  "@angular/forms": "^8.0.0",
  "@angular/material": "^8.1.4",
  "@angular/material-examples": "angular/material2-docs-content#8.1.x",
  "@angular/material-experimental": "^8.1.1",
  "@angular/material-moment-adapter": "^8.1.4",
  "@angular/platform-browser": "^8.0.0",
  "@angular/platform-browser-dynamic": "^8.0.0",
  "@angular/router": "^8.0.0",
  "core-js": "^2.6.1",
  "hammerjs": "^2.0.8",
  "material-components-web": "^1.1.1",
  "moment": "^2.23.0",
  "rxjs": "^6.5.1",
  "zone.js": "^0.9.0"
,
"devDependencies": 
  "@angular-devkit/build-angular": "^0.800.0",
  "@angular/cli": "^8.0.0",
  "@angular/compiler-cli": "^8.0.0",
  "@types/jasmine": "^3.3.5",
  "@types/node": "^10.12.18",
  "firebase-tools": "^6.2.2",
  "jasmine-core": "~2.99.1",
  "jasmine-spec-reporter": "~4.2.1",
  "karma": "^3.1.4",
  "karma-chrome-launcher": "^2.2.0",
  "karma-firefox-launcher": "^1.1.0",
  "karma-jasmine": "^1.1.2",
  "karma-jasmine-html-reporter": "^0.2.2",
  "node-sass": "^4.11.0",
  "protractor": "~5.3.0",
  "ts-node": "^6.0.3",
  "tslint": "^5.10.0",
  "typescript": "3.4"
   
 

我们已经 .克隆了这个 https://github.com/angular/material.angular.io 代码库来构建我们的项目。

【问题讨论】：

您在最终构建中是否需要@angular/material-examples，或者您可以仅将其移至开发依赖项？

我不知道（按照这个 repo 作为参考 github.com/angular/material.angular.io）。但我试图移动它并使用 ng build --prod 重建，同样的问题。

尝试删除 node_modules 目录的内容，然后使用“npm install”重新安装模块

试过了..没有帮助:(

【参考方案1】：

我们能够解决问题，发布解决方案以供参考：

按照https://github.com/angular/material.angular.io/issues/629中的建议，将package.json中angular/material2-docs-content的版本更新为

"@angular/material-examples": "angular/material2-docs-content#8.0.x",

修复了问题。

使用时有问题：

"@angular/material-examples": "angular/material2-docs-content#8.1.x",