【angular4+】Import related error

• An error occurred: @Output not initialized

报错代码：

import { EventEmitter } from 'events';

解决方案：

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

参考：stackoverflow

• Can't bind to 'formControl' since it isn't a known property of 'input' - angular2 material Autocomplete issue

解决方案：必须import ReactiveFormsModule

import {FormsModule, ReactiveFormsModule} from '@angular/forms';

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    ReactiveFormsModule,
    MaterialModule,
  ],
  ...
})
export class AppModule {}

参考：stackoverflow