CanLoad
一个接口，某些类可以实现它以扮演一个守卫，来决定该路由的子路由能否加载。
Interface that a class can implement to be a guard deciding if children can be loaded.
interface CanLoad {
canLoad(route: Route, segments: UrlSegment[]): Observable<boolean> | Promise<boolean> | boolean
}
说明
class UserToken {}
class Permissions {
canLoadChildren(user: UserToken, id: string, segments: UrlSegment[]): boolean {
return true;
}
}
@Injectable()
class CanLoadTeamSection implements CanLoad {
constructor(private permissions: Permissions, private currentUser: UserToken) {}
canLoad(route: Route, segments: UrlSegment[]): Observable<boolean>|Promise<boolean>|boolean {
return this.permissions.canLoadChildren(this.currentUser, route, segments);
}
}
@NgModule({
imports: [
RouterModule.forRoot([
{
path: 'team/:id',
component: TeamComponent,
loadChildren: 'team.js',
canLoad: [CanLoadTeamSection]
}
])
],
providers: [CanLoadTeamSection, UserToken, Permissions]
})
class AppModule {}
你还可以转而提供一个具有 canLoad 签名的函数：
You can alternatively provide a function with the canLoad signature:
@NgModule({
imports: [
RouterModule.forRoot([
{
path: 'team/:id',
component: TeamComponent,
loadChildren: 'team.js',
canLoad: ['canLoadTeamSection']
}
])
],
providers: [
{
provide: 'canLoadTeamSection',
useValue: (route: Route, segments: UrlSegment[]) => true
}
]
})
class AppModule {}
方法
参数
返回值
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