使用ng2-bootstrap與Angular 2 RC 6 - 無法綁定到無法綁定到[...]，因為它不是[...]的已知屬性

Question

我剛剛開始使用Angular 2（RC 6），我遇到了使用ng2-bootstrap的問題。 我知道RC 6最近出現了，但我認為這只是我做錯了而不是一個bug。

我正在嘗試從ng2-boostrap演示頁面重新創建基本演示，特別是先行演示盒演示。 這是我的AppModule ：

import { NgModule, Component, ViewChild }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AlertModule, TypeaheadModule, Ng2BootstrapModule }   from 'ng2-bootstrap/ng2-bootstrap';
import { FormsModule, ReactiveFormsModule, Validators } from '@angular/forms';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/of';

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


@NgModule({
  imports: [ BrowserModule, Ng2BootstrapModule, AlertModule, TypeaheadModule, FormsModule ],
  declarations: [ AppComponent ],
  bootstrap: [ AppComponent ],
})
export class AppModule { }

然后是app.component：

import { Component, ViewChild } from '@angular/core';
import { FormControl, FormGroup } from '@angular/forms';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/of';

@Component({
    selector: 'my-app',
    templateUrl: 'app/main.html'
})
export class AppComponent {

  public customSelected:string = '';
  public selected:string = '';
  public dataSource:Observable<any>;
  public asyncSelected:string = '';
  public typeaheadLoading:boolean = false;
  public typeaheadNoResults:boolean = false;
  public states:Array<string> = ['Alabama', 'Alaska', 'Arizona', 'Arkansas',
    'California', 'Colorado',
    'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho',
    'Illinois', 'Indiana', 'Iowa',
    'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts',
    'Michigan', 'Minnesota',
    'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
    'New Jersey', 'New Mexico',
    'New York', 'North Dakota', 'North Carolina', 'Ohio', 'Oklahoma', 'Oregon',
    'Pennsylvania', 'Rhode Island',
    'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
    'Virginia', 'Washington',
    'West Virginia', 'Wisconsin', 'Wyoming'];
  public statesComplex:Array<any> = [
    {id: 1, name: 'Alabama'}, {id: 2, name: 'Alaska'}, {id: 3, name: 'Arizona'},
    {id: 4, name: 'Arkansas'}, {id: 5, name: 'California'}];

  public constructor() {
    this.dataSource = Observable.create((observer:any) => {
      // Runs on every search
      observer.next(this.asyncSelected);
    }).mergeMap((token:string) => this.getStatesAsObservable(token));
  }

  public getStatesAsObservable(token:string):Observable<any> {
    let query = new RegExp(token, 'ig');

    return Observable.of(
      this.statesComplex.filter((state:any) => {
        return query.test(state.name);
      })
    );
  }

  public changeTypeaheadLoading(e:boolean):void {
    this.typeaheadLoading = e;
  }

  public changeTypeaheadNoResults(e:boolean):void {
    this.typeaheadNoResults = e;
  }

  public typeaheadOnSelect(e:any):void {
    console.log('Selected value: ', e.item);
  }
}

相關的HTML代碼段：

  <input [typeahead]="states"
          (typeaheadOnSelect)="typeaheadOnSelect($event)"
          [typeaheadOptionsLimit]="7"
          [typeaheadOptionField]="'name'"
          [typeaheadMinLength]="0"
          placeholder="Typeahead inside a form"
          class="form-control">

我得到的錯誤是這樣的：

Can't bind to 'typeahead' since it isn't a known property of 'input'. ("
  <h4>Typeahead inside a form</h4>

  <input [ERROR ->][typeahead]="states"
          (typeaheadOnSelect)="typeaheadOnSelect($event)"
          [typeaheadOp"): AppComponent@12:9
Can't bind to 'typeaheadOptionsLimit' since it isn't a known property of 'input'. ("
[....]

最后，這是我的系統js配置：

(function (global) {
  System.config({
    paths: {
      // paths serve as alias
      'npm:': 'node_modules/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      app: 'app',

      // angular bundles
      '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
      '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
      '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',

      // other libraries
      'rxjs':                       'npm:rxjs',
      'angular2-in-memory-web-api': 'npm:angular2-in-memory-web-api',
      'moment': 'node_modules/moment/moment.js',
      'ng2-bootstrap': 'node_modules/ng2-bootstrap'
    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: { main: './main.js', defaultExtension: 'js' },
      rxjs: { defaultExtension: 'js' },
      'angular2-in-memory-web-api': { main: './index.js', defaultExtension: 'js' },
      'ng2-bootstrap': {defaultJSExtensions: true}
    }
  });
})(this);

有沒有人有什么建議？ 目前我可以看到ng2-bootstrap應該在SystemJS中加載，我認為在AppModule中的導入是正確的，一切都應該在那里工作，但我顯然遺漏了一些東西。

Answer 1

未找到或匹配Typeahead。 我懷疑它沒有匹配。

根據這里的文檔（ https://valor-software.com/ng2-bootstrap/#/typeahead），typeahead的選擇器需要一個看起來像缺少的[（ngModel）]綁定。

將組件中的字符串綁定到ngModel，如<input [(ngModel)]="selected" ... > ，然后Typeahead選擇器應該啟動。