No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the do

angular路由报错：路由配置缺少APP_BASE_HREF

解决方法：加入APP_BASE_HREF即可

app.module.ts

import { APP_BASE_HREF } from '@angular/common';

@NgModule({
  providers: [{ provide: APP_BASE_HREF, useValue: '' }]
})

export class AppModule {
}