Property binding ngif not used by any directive on an embedded template

Question

I am creating a simple application in Angular (Angular2 RC4) and I'm finding it difficult to run the application with the live server in nodejs.

I would like to aid as to what I can do to work around the error that is appearing in the Chrome console.

Erro in console Chrome:

browser_adapter.ts:82
EXCEPTION: Template parse errors:
Property binding ngif not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "directives" section. ("
</video-list>

[ERROR ->]<video-detail *ngif="selectedVideo" [video]="selectedVideo">
</video-detail>"): AppComponent@8:0**

app.component.ts

import {Input, Output, Component} from '@angular/core'
import {Config} from './config.service'
import {Video} from './video'
import {VideoListComponent} from './videolist.component'
import {VideoDetailComponent} from './videodetail.component'

@Component({
    selector: 'my-app',
    templateUrl: 'app/app.component.html',
    directives: [VideoListComponent, VideoDetailComponent]
})
export class AppComponent {
    title = Config.TITLE_PAGE;
    videos: Array<Video>;
    selectedVideo : Video;

constructor() {
    this.videos = [
        new Video(1, "Test", "www.test.com", "Test Description"),
        new Video(2, "Test 2", "www.test2.com")
    ]
}

onSelectVideo(video) {
    //console.log(JSON.stringify(video));
    this.selectedVideo = video;
}
}

app.component.html

<h1 class="jumbotron">
    {{title}}
</h1>
<!-- conceito [binding]  videos recebe os valores do AppComponent.ts-->
<video-list [videos]="videos" 
    (selectVideo)="onSelectVideo($event)">
</video-list>

<video-detail *ngif="selectedVideo" [video]="selectedVideo">
</video-detail>

package.json

{
"name": "angularbase",
  "version": "1.0.0",
  "description": "Projeto Base",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "projeto",
    "base",
    "angular",
    "angular2"
  ],
  "author": "Eduardo Cordeiro",
  "license": "ISC",
  "dependencies": {
    "@angular/common": "^2.0.0-rc.4",
    "@angular/compiler": "^2.0.0-rc.4",
    "@angular/core": "^2.0.0-rc.4",
    "@angular/forms": "^0.2.0",
    "@angular/http": "^2.0.0-rc.4",
    "@angular/platform-browser": "^2.0.0-rc.4",
    "@angular/platform-browser-dynamic": "^2.0.0-rc.4",
    "@angular/upgrade": "^2.0.0-rc.4",
    "angular2-in-memory-web-api": "0.0.7",
    "bootstrap": "^3.3.6",
    "rxjs": "^5.0.0-beta.6",
    "systemjs": "^0.19.27",
    "zone.js": "^0.6.12"
  }
}

systemjs.config.js

(function (global) {

    // mapa de carregamento do systemjs
    var map = {
        'app': 'app', // 'dist',
        'rxjs': 'node_modules/rxjs',
        'angular2-in-memory-web-api': 'node_modules/angular2-in-memory-web-api',
        '@angular': 'node_modules/@angular'
    };

    // pacotes que o systemjs pode carregar
    //  caso não encontre o arquivo no mapa
    var packages = {
        'app': { main: 'boot.js', defaultExtension: 'js' },
        'rxjs': { defaultExtension: 'js' },
        'angular2-in-memory-web-api': { defaultExtension: 'js' },
    };

    var packageNames = [
        '@angular/common',
        '@angular/compiler',
        '@angular/core',
        '@angular/http',
        '@angular/platform-browser',
        '@angular/platform-browser-dynamic',
        '@angular/router',
        '@angular/router-deprecated',
        '@angular/testing',
        '@angular/upgrade',
    ];

    // mapeia os pacotes do angular de acordo com o packageName acima
    packageNames.forEach(function (pkgName) {
        packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
    });

    var config = {
        map: map,
        packages: packages
    }

    if (global.filterSystemConfig) { global.filterSystemConfig(config); }
    System.config(config);

})(this);

tsconfig.json

{
"compilerOptions": {
    "target": "es6",
    "module": "system",
    "sourceMap": true,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false,
    "watch": true 
},
"exclude": [
    "node_modules"
]
}

Answer 1

Angular2 directives are case-sensitive. The directive is *ngIf, with capital 'I'.

Angular throws an error for *ngif, because it doesn't know what such directive is.

Answer 2

You should import the CommonModule either in the root module (AppModule), or in the module that you want to use *ngIf in (e.g. TestModule).

import { CommonModule } from "@angular/common";
...
@NgModule({
    imports: [CommonModule]
    ...
})
export class AppModule { }