Angular2异常:由于它不是已知的本机属性，因此无法绑定到"routerLink" [英] Angular2 Exception: Can't bind to 'routerLink' since it isn't a known native property
问题描述
很明显，Angular2的beta版比新的要新，因此那里没有太多的信息，但是我正在尝试做一些我认为比较基本的路由.
Obviously the beta for Angular2 is newer than new, so there's not much information out there, but I am trying to do what I think is some fairly basic routing.
缺少 https://angular.io 网站上的快速入门代码和其他摘要，导致以下文件结构:
Hacking about with the quick-start code and other snippets from the https://angular.io website has resulted in the following file structure:
angular-testapp/
app/
app.component.ts
boot.ts
routing-test.component.ts
index.html
文件填充如下:
index.html
<html>
<head>
<base href="/">
<title>Angular 2 QuickStart</title>
<link href="../css/bootstrap.css" rel="stylesheet">
<!-- 1. Load libraries -->
<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="node_modules/rxjs/bundles/Rx.js"></script>
<script src="node_modules/angular2/bundles/angular2.dev.js"></script>
<script src="node_modules/angular2/bundles/router.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
packages: {
app: {
format: 'register',
defaultExtension: 'js'
}
}
});
System.import('app/boot')
.then(null, console.error.bind(console));
</script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>
</html>
boot.ts
import {bootstrap} from 'angular2/platform/browser'
import {ROUTER_PROVIDERS} from 'angular2/router';
import {AppComponent} from './app.component'
bootstrap(AppComponent, [
ROUTER_PROVIDERS
]);
app.component.ts
import {Component} from 'angular2/core';
import {RouteConfig, ROUTER_DIRECTIVES, ROUTER_PROVIDERS, LocationStrategy, HashLocationStrategy} from 'angular2/router';
import {RoutingTestComponent} from './routing-test.component';
@Component({
selector: 'my-app',
template: `
<h1>Component Router</h1>
<a [routerLink]="['RoutingTest']">Routing Test</a>
<router-outlet></router-outlet>
`
})
@RouteConfig([
{path:'/routing-test', name: 'RoutingTest', component: RoutingTestComponent, useAsDefault: true},
])
export class AppComponent { }
routing-test.component.ts
import {Component} from 'angular2/core';
import {Router} from 'angular2/router';
@Component({
template: `
<h2>Routing Test</h2>
<p>Interesting stuff goes here!</p>
`
})
export class RoutingTestComponent { }
尝试运行此代码会产生错误:
Attempting to run this code produces the error:
EXCEPTION: Template parse errors:
Can't bind to 'routerLink' since it isn't a known native property ("
<h1>Component Router</h1>
<a [ERROR ->][routerLink]="['RoutingTest']">Routing Test</a>
<router-outlet></router-outlet>
"): AppComponent@2:11
我在这里发现了一个模糊的相关问题； 升级到angular2.0.0-beta.0 .但是，答案之一中的有效示例"是基于beta版的代码-可能仍然可以使用，但是我想知道为什么我创建的代码不起作用.
I found a vaguely related issue here; router-link directives broken after upgrading to angular2.0.0-beta.0. However, the "working example" in one of the answers is based on pre-beta code - which may well still work, but I would like to know why the code I have created is not working.
任何指针将不胜感激！
推荐答案
> = RC.5
导入RouterModule
另请参见 https://angular.io/guide/router
@NgModule({
imports: [RouterModule],
...
})
> = RC.2
app.routes.ts
import { provideRouter, RouterConfig } from '@angular/router';
export const routes: RouterConfig = [
...
];
export const APP_ROUTER_PROVIDERS = [provideRouter(routes)];
main.ts
import { bootstrap } from '@angular/platform-browser-dynamic';
import { APP_ROUTER_PROVIDERS } from './app.routes';
bootstrap(AppComponent, [APP_ROUTER_PROVIDERS]);
< = RC.1
您的代码丢失
@Component({
...
directives: [ROUTER_DIRECTIVES],
...)}
如果不使组件知道它们，就不能使用像routerLink或router-outlet这样的指令.
You can't use directives like routerLink or router-outlet without making them known to your component.
虽然指令名称在Angular2中更改为区分大小写，但元素仍使用-之类的名称，例如<router-outlet>，以与Web组件规范兼容，该规范要求在自定义元素的名称中使用-
While directive names were changed to be case-sensitive in Angular2, elements still use - in the name like <router-outlet> to be compatible with the web-components spec which require a - in the name of custom elements.
全局注册
要使ROUTER_DIRECTIVES全局可用，请将此提供程序添加到bootstrap(...):
To make ROUTER_DIRECTIVES globally available, add this provider to bootstrap(...):
provide(PLATFORM_DIRECTIVES, {useValue: [ROUTER_DIRECTIVES], multi: true})
然后不再需要在每个组件中添加ROUTER_DIRECTIVES.
then it's no longer necessary to add ROUTER_DIRECTIVES to each component.
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