错误错误: Uncaught (为了承诺)：TypeError:未定义不是一个函数

Question

我正在尝试用离子项目实现Lazyloading，但是在实现时我会出错，在实现lazyloading时，我会将错误放在下面。

core.js:1449错误:未定义(承诺)：TypeError:未定义不是函数TypeError:未定义不是函数

我把代码放在下面

app.module.ts

import { NextPageModule } from '../pages/next/next.module';
import { HomePageModule } from './../pages/home/home.module';
import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { SplashScreen } from '@ionic-native/splash-screen';
import { StatusBar } from '@ionic-native/status-bar';

import { MyApp } from './app.component';

@NgModule({
  declarations: [
    MyApp,
  ],
  imports: [
    HomePageModule,
    NextPageModule,
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

app.component.ts

import { Component } from '@angular/core';
import { Platform } from 'ionic-angular';
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

// import { HomePage } from '../pages/home/home';
@Component({
  templateUrl: 'app.html'
})
export class MyApp {
  rootPage:string = 'NextPage';

  constructor(platform: Platform, statusBar: StatusBar, splashScreen: SplashScreen) {
    platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      statusBar.styleDefault();
      splashScreen.hide();
    });
  }
}

Answer 1

解出

为了解决这个错误，我遇到了很多困难，我终于找到了解决方案，我刚刚运行了npm install @ionic/app-scripts@3.1.7-201801172029

或npm install @ionic/app-scripts@3.1.7

或npm install @ionic/app-scripts@Version that works for you

问题不在于您的代码，而在于应用程序脚本版本。