我收到错误,找不到原因.这是错误:
EXCEPTION: Error during instantiation of LocationStrategy! (RouterOutlet -> Router -> Location -> LocationStrategy). angular2.dev.js:23514 EXCEPTION: Error during instantiation of LocationStrategy! (RouterOutlet -> Router -> Location -> LocationStrategy).BrowserDomAdapter.logError @ angular2.dev.js:23514BrowserDomAdapter.logGroup @ angular2.dev.js:23525ExceptionHandler.call @ angular2.dev.js:1145(anonymous function) @ angular2.dev.js:14801NgZone._notifyOnError @ angular2.dev.js:5796collection_1.StringMapWrapper.merge.onError @ angular2.dev.js:5700run @ angular2-polyfills.js:141(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$$internal$$tryCatch @ angular2-polyfills.js:1511lib$es6$promise$$internal$$invokeCallback @ angular2-polyfills.js:1523lib$es6$promise$$internal$$publish @ angular2-polyfills.js:1494(anonymous function) @ angular2-polyfills.js:243microtask @ angular2.dev.js:5751run @ angular2-polyfills.js:138(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$asap$$flush @ angular2-polyfills.js:1305 angular2.dev.js:23514 ORIGINAL EXCEPTION: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.BrowserDomAdapter.logError @ angular2.dev.js:23514ExceptionHandler.call @ angular2.dev.js:1154(anonymous function) @ angular2.dev.js:14801NgZone._notifyOnError @ angular2.dev.js:5796collection_1.StringMapWrapper.merge.onError @ angular2.dev.js:5700run @ angular2-polyfills.js:141(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$$internal$$tryCatch @ angular2-polyfills.js:1511lib$es6$promise$$internal$$invokeCallback @ angular2-polyfills.js:1523lib$es6$promise$$internal$$publish @ angular2-polyfills.js:1494(anonymous function) @ angular2-polyfills.js:243microtask @ angular2.dev.js:5751run @ angular2-polyfills.js:138(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$asap$$flush @ angular2-polyfills.js:1305 angular2.dev.js:23514 ORIGINAL STACKTRACE:BrowserDomAdapter.logError @ angular2.dev.js:23514ExceptionHandler.call @ angular2.dev.js:1157(anonymous function) @ angular2.dev.js:14801NgZone._notifyOnError @ angular2.dev.js:5796collection_1.StringMapWrapper.merge.onError @ angular2.dev.js:5700run @ angular2-polyfills.js:141(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$$internal$$tryCatch @ angular2-polyfills.js:1511lib$es6$promise$$internal$$invokeCallback @ angular2-polyfills.js:1523lib$es6$promise$$internal$$publish @ angular2-polyfills.js:1494(anonymous function) @ angular2-polyfills.js:243microtask @ angular2.dev.js:5751run @ angular2-polyfills.js:138(anonymous function) @ angular2.dev.js:5719zoneBoundFn @ angular2-polyfills.js:111lib$es6$promise$asap$$flush @ angular2-polyfills.js:1305 angular2.dev.js:23514 Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document. at new BaseException (angular2.dev.js:8080) at new PathLocationStrategy (router.dev.js:1203) at angular2.dev.js:1380 at Injector._instantiate (angular2.dev.js:11923) at Injector._instantiateProvider (angular2.dev.js:11859) at Injector._new (angular2.dev.js:11849) at InjectorDynamicStrategy.getObjByKeyId (angular2.dev.js:11733) at Injector._getByKeyDefault (angular2.dev.js:12048) at Injector._getByKey (angular2.dev.js:12002) at Injector._getByDependency (angular2.dev.js:11990)
有谁知道为什么路由器会抛出这个?我正在使用angular2 beta
这是我的代码:
import {Component} from 'angular2/core';
import { RouteConfig, ROUTER_DIRECTIVES } from 'angular2/router';
import {LoginComponent} from './pages/login/login.component';
import {DashboardComponent} from './pages/dashboard/dashboard.component';
@Component({
selector: 'app',
directives:[ROUTER_DIRECTIVES],
template:`
`
})
@RouteConfig([
{ path: '/',redirectTo: '/dashboard' },
{ path: '/login',name:'login',component: LoginComponent },
{ path: '/dashboard',name:'dashboard',component: DashboardComponent,}
])
export class AppComponent {
}
Günter Zöchb.. 347
https://angular.io/docs/ts/latest/guide/router.html
在
标记之后添加基本元素.如果
app
文件夹是应用程序根目录,就像我们的应用程序一样,请完全按照此处所示设置href
值.
该
告诉角度路由器网址是什么的静态部分.然后,路由器仅修改URL的剩余部分.
...
或者添加
> = Angular2 RC.6
import {APP_BASE_HREF} from '@angular/common';
@NgModule({
declarations: [AppComponent],
imports: [routing /* or RouterModule */],
providers: [{provide: APP_BASE_HREF, useValue : '/' }]
]);
在你的引导程序中.
在旧版本中,导入必须像
import {APP_BASE_HREF} from '@angular/common';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
{provide: APP_BASE_HREF, useValue : '/' });
]);
import {provide} from 'angular2/core';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
provide(APP_BASE_HREF, {useValue : '/' });
]);
import {APP_BASE_HREF} from 'angular2/router';
> = beta.17
import {APP_BASE_HREF} from 'angular2/platform/common';
另请参阅Location和HashLocationStrategy在beta.16中停止工作
https://angular.io/docs/ts/latest/guide/router.html
在
标记之后添加基本元素.如果
app
文件夹是应用程序根目录,就像我们的应用程序一样,请完全按照此处所示设置href
值.
该
告诉角度路由器网址是什么的静态部分.然后,路由器仅修改URL的剩余部分.
...
或者添加
> = Angular2 RC.6
import {APP_BASE_HREF} from '@angular/common';
@NgModule({
declarations: [AppComponent],
imports: [routing /* or RouterModule */],
providers: [{provide: APP_BASE_HREF, useValue : '/' }]
]);
在你的引导程序中.
在旧版本中,导入必须像
import {APP_BASE_HREF} from '@angular/common';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
{provide: APP_BASE_HREF, useValue : '/' });
]);
import {provide} from 'angular2/core';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
provide(APP_BASE_HREF, {useValue : '/' });
]);
import {APP_BASE_HREF} from 'angular2/router';
> = beta.17
import {APP_BASE_HREF} from 'angular2/platform/common';
另请参阅Location和HashLocationStrategy在beta.16中停止工作
我在Angular4和Jasmine单元测试中遇到过类似的问题; 以下给出的解决方案适合我
添加以下import语句
import { APP_BASE_HREF } from '@angular/common';
为TestBed配置添加以下语句:
TestBed.configureTestingModule({ providers: [ { provide: APP_BASE_HREF, useValue : '/' } ] })
您还可以通过在app.module.ts中包含以下内容来使用基于哈希的导航
import { LocationStrategy, HashLocationStrategy } from '@angular/common';
并将以下内容添加到@NgModule({...})
@NgModule({ ... providers: [ ProductService, { provide: LocationStrategy, useClass: HashLocationStrategy } ], ... })
"HashLocationStrategy-A哈希符号(#)被添加到URL中,并且哈希后的URL段唯一地标识要用作网页片段的路由.此策略适用于所有浏览器,包括旧浏览器."
摘录自:Yakov Fain Anton Moiseev."使用TypeScript开发Angular 2."
自2.0测试版:)
import { APP_BASE_HREF } from 'angular2/platform/common';
只是在index.html head标签中添加以下代码
...
对我来说就像一个魅力。