Angular 2，模板错误破解简单的网站

Question

我试图修改NG2课程的代码，使NG2中的动态Spotify播放器。当我将<h1>anything</h1>添加到我的模板app.component.js中时，它可以工作。当我在+`的代码添加给这个错误

zone.min.js:1 Unhandled Promise rejection: Template parse errors: 
'spotifyiframeplayer' is not a known element: 
1. If 'spotifyiframeplayer' is an Angular component, then verify that it is part of this module. 
2. If 'spotifyiframeplayer' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schema' of this component to suppress this message. ("<h1>Spotify Iframe Player</h1>[ERROR ->]<spotifyiframeplayer></spotifyiframeplayer>"): AppComponent@0:30 ; Zone: <root> ; Task: Promise.then ; Value: Error: Template parse errors:(…) Error: Template parse errors: 
'spotifyiframeplayer' is not a known element: 
1. If 'spotifyiframeplayer' is an Angular component, then verify that it is part of this module. 
2. If 'spotifyiframeplayer' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schema' of this component to suppress this message. ("<h1>Spotify Iframe Player</h1>[ERROR ->]<spotifyiframeplayer></spotifyiframeplayer>"): AppComponent@0:30 
    at TemplateParser.parse (https://unpkg.com/@angular/compiler@2.0.0/bundles/compiler.umd.js:8530:21) 
    at RuntimeCompiler._compileTemplate (https://unpkg.com/@angular/compiler@2.0.0/bundles/compiler.umd.js:16905:53) 
    at https://unpkg.com/@angular/compiler@2.0.0/bundles/compiler.umd.js:16828:85 
    at Set.forEach (native) 
    at compile (https://unpkg.com/@angular/compiler@2.0.0/bundles/compiler.umd.js:16828:49) 
    at e.invoke (https://unpkg.com/zone.js@0.6.21/dist/zone.min.js:1:15936) 
    at n.run (https://unpkg.com/zone.js@0.6.21/dist/zone.min.js:1:13323) 
    at https://unpkg.com/zone.js@0.6.21/dist/zone.min.js:1:11425 
    at e.invokeTask (https://unpkg.com/zone.js@0.6.21/dist/zone.min.js:1:16565) 
    at n.runTask (https://unpkg.com/zone.js@0.6.21/dist/zone.min.js:1:13925)o @ zone.min.js:1a @ zone.min.js:1a @ zone.min.js:1 
zone.min.js:1 Error: Uncaught (in promise): Error: Template parse errors:(…)o @ zone.min.js:1a @ zone.min.js:1a @ zone.min.js:1 

Link to Plunker 我不知道如何解决这个问题的错误。我已经检查过，元素只在示例代码中提到过一次，并且适用于该项目。

@galvon（这也是对plunker）

(function(app) { 
    var Component = ng.core.Component; 

    app.AppComponent = Component({ 
    selector: 'my-app', 
    template: 
     ` 
     <h1>Spotify Iframe Player</h1> 
     <spotifyiframeplayer></spotifyiframeplayer> 
     ` 
    }) 
    .Class({ 
    constructor: function AppComponent() { } 
    }); 

})(window.app || (window.app = {})); 

Answer 1

不使用+追加字符串。

使用多HTML，您可以使用反引号（发现你的键盘 - ` ）如下图所示，

template: 
     '<h1>Spotify Iframe Player</h1>' + 
     '<spotifyiframeplayer></spotifyiframeplayer>' 

改变它

template: 
     ` 
     <h1>Spotify Iframe Player</h1> 
     <spotifyiframeplayer></spotifyiframeplayer> 
     ` 

备注：除此之外，你的闯入者是不完整的，所以即使在此之后ge不要期望plunker运行，因为你没有spotifyiframeplayer组件实现。