Angular 9 mat-progress-buttons错误：ERROR in编译入口mat-progress-buttons（es2015 as esm2015）时失败，因为存在编译错误。

Question

从Angular 8更新到Angular 9后，使用下面的mat-progress-button出现错误。在Angular 8中可以正常工作。MatProgressButton与Angular 9不兼容吗？

node_modules/mat-progress-buttons/esm2015/mat-progress-buttons.js:181:26 - error NG1010: Value at position 1 in the NgModule.imports of MatProgressButtonsModule is not a reference: [object Object]

导入语句如下：

import { MatProgressButtonsModule } from 'mat-progress-buttons';

我的 package.json 文件如下：

  "dependencies": {
    "@angular/animations": "^9.0.2",
    "@angular/cdk": "^9.1.0",
    "@angular/common": "~9.0.2",
    "@angular/compiler": "~9.0.2",
    "@angular/core": "~9.0.2",
    "@angular/forms": "~9.0.2",
    "@angular/material": "^9.1.0",
    ...
    "@angular/router": "~9.0.2",
    "core-js": "^2.5.4",
    "mat-file-upload": "^1.3.2",
    "mat-progress-buttons": "^8.0.7",
    "rxjs": "~6.5.4",
    "tslib": "^1.10.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.900.3",
    "@angular/cli": "~9.0.3",
    "@angular/compiler-cli": "~9.0.2",
    "@angular/language-service": "~9.0.2",
   ...
    "typescript": "^3.7.5"
  }
}

- user12970713

---

我也遇到了同样的问题（这是我的SO问题），看起来与Angular 9如何处理深度导入有关，但我找不到任何解决方案。 - Francesco

Answer 1

我曾经遇到相同的问题。似乎安装的模块版本存在某种错误。我通过删除node_module文件夹并使用npm install重新初始化来解决了这个问题。

- JB17

Answer 2

删除了node_modules文件夹、dist文件夹和package-lock.json文件

npm cache clean --force
npm cache verify
npm i

然后它对我起作用了！

- Divyanshi Mangal