angular - 错误类型错误 : Class constructor EventEmitter_ cannot be invoked without 'new'

Question

升级到 Angular 10 后，某些组件出现以下错误 -

ERROR TypeError: Class constructor EventEmitter_ cannot be invoked without 'new'
    at new ZoneAwareEventEmitter (index.js:34)
    at new GridComponent (index.js:6167)
    at createClass (core.js:21921)
    at createDirectiveInstance (core.js:21790)
    at createViewNodes (core.js:30281)
    at callViewAction (core.js:30597)
    at execComponentViewsAction (core.js:30516)
    at createViewNodes (core.js:30309)
    at callViewAction (core.js:30597)
    at execComponentViewsAction (core.js:30516)

导致此问题的代码 -

import { EventEmitter } from "@angular/core";

export class ZoneAwareEventEmitter extends EventEmitter {
    constructor(ngZone, isAsync = false) {
        super(isAsync);
        this.ngZone = ngZone;
    }
}

我错过了什么吗？
在此先感谢您的帮助!

Answer 1

将此添加到 Webpack 配置:

resolve: {
    mainFields: ['es2015', 'browser', 'module', 'main']
},

该问题发生在使用 Kendo Angular Grid 的项目中的 Webpack 构建中.默认的 Webpack 配置解决了 fesm5模块来自 node_modules/@progress/kendo-angular-grid ，它尝试使用 es5 扩展 EventEmitter 类并导致错误。更改 mainFields resolve 的属性(property)在 Webpack 配置中设置优先级 es2015模块为我解决了这个问题。