执行node (关于firebase)时出错，但app工作正常，即使使用firebase (angular-universal)也是如此

Question

我使用angular-universal来连接angular和node.js，同时使用firebase作为虚拟数据。该应用程序同时使用angular和node (甚至在firebase中获取和保存数据)。

在angular中运行时，控制台(浏览器控制台和ng服务器)中没有错误。

当在node中运行时，它会在控制台中记录一个关于firebase的错误(即使应用程序使用firebase工作)。

这是错误：

ERROR TypeError: firebase.initializeApp is not a function
    at AppComponent../src/app/app.component.ts.AppComponent.ngOnInit (C:\Users\****\Desktop\****\Fevereiro\projeto\dist\server.js:131902:18)
    at checkAndUpdateDirectiveInline (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:27407:19)
    at checkAndUpdateNodeInline (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:28671:20)
    at checkAndUpdateNode (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:28633:16)
    at prodCheckAndUpdateNode (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:29174:5)
    at Object.updateDirectives (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:131877:264)
    at Object.updateDirectives (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:28962:72)
    at Object.checkAndUpdateView (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:28615:14)
    at ViewRef_.detectChanges (C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:26996:22)
    at C:\Users\*****\Desktop\*****\Fevereiro\projeto\dist\server.js:23427:63

调用initializeApp方法的(C:\Users****\Desktop****\Fevereiro\projeto\dist\server.js)代码：

Object.defineProperty(exports, "__esModule", { value: true });
var core_1 = __webpack_require__(/*! @angular/core */ "@angular/core");
var firebase = __webpack_require__(/*! firebase */ "firebase");
var AppComponent = /** @class */ (function () {
    function AppComponent() {
        this.loadedFeature = 'recipe';
    }
    AppComponent.prototype.ngOnInit = function () {
        firebase.initializeApp({
            apiKey: "******",
            authDomain: "******",
        });
    };
    AppComponent.prototype.onNavigate = function (feature) {
        this.loadedFeature = feature;
    };
    return AppComponent;
}());
exports.AppComponent = AppComponent;

Answer 1

我之前从“firebase”导入的时候也遇到了同样的问题。你应该从' firebase /app‘导入firebase