core.js:4197 ERROR TypeError: Cannot call a class as a function

Question

在为 Angular 应用程序提供服务时，在 Angular v10

中出现以下控制台错误

core.js:4197 ERROR TypeError: Cannot call a class as a function
    at _classCallCheck (classCallCheck.js:3)
    at new Button (button.js:36)
    at ButtonComponent.<anonymous> (createSuper.js:12)
    at new ButtonComponent (button.component.ts:30)
    at NodeInjectorFactory.ButtonComponent_Factory [as factory] (button.component.ts:57)
    at getNodeInjectable (core.js:4029)
    at instantiateAllDirectives (core.js:8092)
    at createDirectivesInstances (core.js:7474)
    at ɵɵelementStart (core.js:14001)
    at SBController_Template (template.html:114)

演示：https://github.com/kumaresan-subramani/AngularSampleIssue

重现步骤：

npm i
npm 运行开始

来自 angular 团队的回答 - https://github.com/angular/angular-cli/issues/18125#issuecomment-672069800

Answer 1

我确实看过你的回购协议。看起来你的 ES target 在你的 tsconfig.base.json 文件中被设置为 es5，它不支持 class。我认为你必须至少从 es6 (es2015) 开始设置它，然后它应该可以工作：

{
  "compilerOptions": {
    "target": "es2015",
  }
}

core.js:4197 ERROR TypeError: Cannot call a class as a function

core.js:4197 ERROR TypeError: Cannot call a class as a function

javascript

typescript

angular

angular-cli-v9