Angular Ionic-amcharts4-对象原型只能是对象或null:未定义

更新包后开始抛出错误。我尝试回滚更新，但错误仍在继续

package.json：

{
  "name": "nexus-pwa",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "https://ionicframework.com/",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@amcharts/amcharts4": "^4.7.10",
    "@angular/common": "~8.2.14",
    "@angular/compiler": "~8.2.14",
    "@angular/core": "~8.2.14",
    "@angular/forms": "~8.2.14",
    "@angular/platform-browser": "~8.2.14",
    "@angular/platform-browser-dynamic": "~8.2.14",
    "@angular/router": "~8.2.14",
    "@ionic-native/core": "^5.17.0",
    "@ionic-native/splash-screen": "^5.17.0",
    "@ionic-native/status-bar": "^5.17.0",
    "@ionic/angular": "^4.11.5",
    "core-js": "^3.4.1",
    "net": "^1.0.2",
    "ngx-spinner": "^8.0.3",
    "npm-check-updates": "^3.2.1",
    "ol": "^6.1.1",
    "point-in-polygon": "^1.0.1",
    "robust-point-in-polygon": "^1.0.3",
    "rxjs": "~6.5.3",
    "sockjs-client": "^1.4.0",
    "stompjs": "^2.3.3",
    "tslib": "^1.10.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/architect": "~0.803.19",
    "@angular-devkit/build-angular": "~0.803.19",
    "@angular-devkit/core": "~8.3.19",
    "@angular-devkit/schematics": "~8.3.19",
    "@angular/cli": "^8.3.19",
    "@angular/compiler": "~8.2.14",
    "@angular/compiler-cli": "~8.2.14",
    "@angular/language-service": "~8.2.14",
    "@ionic/angular-toolkit": "~2.1.1",
    "@types/jasmine": "~3.4.6",
    "@types/jasminewd2": "~2.0.8",
    "@types/node": "~12.12.11",
    "codelyzer": "^5.2.0",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.4.1",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~2.1.0",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.2",
    "protractor": "~5.4.2",
    "ts-node": "~8.5.2",
    "tslint": "~5.20.1",
    "typescript": "~3.5.3"
  },
  "description": "An Ionic project"
}

graph-detail.page.html：

<div #chartElement ></div>

错误：

tslib.es6.js:25 Uncaught TypeError: Object prototype may only be an Object or null: undefined
    at setPrototypeOf (<anonymous>)
    at Module.__extends (tslib.es6.js:25)
    at Label.js:62
    at Module../node_modules/@amcharts/amcharts4/.internal/core/elements/Label.js (Label.js:1345)
    at __webpack_require__ (bootstrap:84)
    at Module../node_modules/@amcharts/amcharts4/.internal/core/System.js (System.js:1)
    at __webpack_require__ (bootstrap:84)
    at Module../node_modules/@amcharts/amcharts4/.internal/core/utils/Animation.js (Animation.js:1)
    at __webpack_require__ (bootstrap:84)
    at Module../node_modules/@amcharts/amcharts4/.internal/core/Sprite.js (Sprite.js:1)

tslib.es6.js:25未捕获类型错误：对象原型只能是对象或null:未定义
在setPrototypeOf（）处
at模块扩展（tslib.es6.js:25）
标签号：js:62
位于Module../node_modules/@amcharts/amcharts4/.internal/core/elements/Label.js（Label.js:1345）
at ___;网页___;需要___;（引导：84）
位于Module../node_modules/@amcharts/amcharts4/.internal/core/System.js（System.js:1）
at ___;网页___;需要___;（引导：84）
位于Module../node_modules/@amcharts/amcharts4/.internal/core/utils/Animation.js（Animation.js:1）
at ___;网页___;需要___;（引导：84）
位于Module../node_modules/@amcharts/amcharts4/.internal/core/Sprite.js（Sprite.js:1）

运行时出错，编译成功。 如果删除“this.createGraph（）；”，错误将继续。 如果删除am4core.create行，错误将消失

我尝试清理node_modules文件夹并重新安装所有软件包。 使用“npm cache clean”清除缓存，而不执行任何操作

有什么想法吗？谢谢

更新：

问题出现在amcharts4库版本中，因为版本4.7.9开始出现故障

---

使用版本4.7.8可以正确地用于上面详述的软件包配置。

您是否尝试了以下命令来构建应用程序

用于角度的

ng build --prod --build-optimizer=false

适用于爱奥尼亚

ionic build --prod --build-optimizer=false

否则，您必须在package.json中添加此语法

"scripts": {
  "build": "ng build --prod --build-optimizer=false"
}

---

嗨，Miyas，我尝试过这种方法，但抛出了相同的错误。@Matí正如我在一个新项目中尝试下面的示例一样，它似乎工作正常，请检查下面的链接：

https://www.amcharts.com/docs/v4/getting-started/integrations/using-angular2/

我有一个角度加工的例子，问题在于ionic项目。甚至我也在ionic项目中尝试了上面的例子，效果很好。graph是通过使用

npm start

命令工作的。它对我来说是使用amchart4版本4.7.8工作的，因为版本4.7.9开始失败。谢谢你，米亚斯。

"scripts": {
  "build": "ng build --prod --build-optimizer=false"
}