15.7.2 - 创建获取路由状态的 Selector

// router.selectors.ts
import { createFeatureSelector } from "@ngrx/store"
import { AppState } from ".."
import { RouterReducerState, getSelectors } from "@ngrx/router-store"
const selectRouter = createFeatureSelector<AppState, RouterReducerState>(
  "router"
)
export const {
  // 获取和当前路由相关的信息 (路由参数、路由配置等)
  selectCurrentRoute,
  // 获取地址栏中 # 号后面的内容
  selectFragment,
  // 获取路由查询参数
  selectQueryParams,
  // 获取具体的某一个查询参数 selectQueryParam('name')
  selectQueryParam,
  // 获取动态路由参数
  selectRouteParams,
     // 获取某一个具体的动态路由参数 selectRouteParam('name')
  selectRouteParam,
  // 获取路由自定义数据
  selectRouteData,
  // 获取路由的实际访问地址
  selectUrl
} = getSelectors(selectRouter)

// home.component.ts
import { select, Store } from "@ngrx/store"
import { AppState } from "src/app/store"
import { selectQueryParams } from "src/app/store/selectors/router.selectors"
export class AboutComponent {
    constructor(private store: Store<AppState>) {
        this.store.pipe(select(selectQueryParams)).subscribe(console.log)
    }
}