在Angular中，如何确定活动路线？

@RouteConfig([
  { path: '/', component: HomePage, name: 'Home' },
  { path: '/signin', component: SignInPage, name: 'SignIn' },
  { path: '/profile/:username/feed', component: FeedPage, name: 'ProfileFeed' },
])

<li [class.active]="router.isRouteActive(router.generate(['/Home']))">
   <a [routerLink]="['/Home']">Home</a>
</li>
<li [class.active]="router.isRouteActive(router.generate(['/SignIn']))">
   <a [routerLink]="['/SignIn']">Sign In</a>
</li>
<li [class.active]="router.isRouteActive(router.generate(['/ProfileFeed', { username: user.username }]))">
    <a [routerLink]="['/ProfileFeed', { username: user.username }]">Feed</a>
</li>

@Component({
   styles: [`.router-link-active { background-color: red; }`]
})
export class NavComponent {
}

import {Router, RouteConfig, ROUTER_DIRECTIVES} from 'angular2/router';
// ...
export class App {
  constructor(private router: Router) {
  }

  // ...

  isActive(instruction: any[]): boolean {
    return this.router.isRouteActive(this.router.generate(instruction));
  }
} 

class MyController {
    constructor(private location:Location) {}

    ...  location.path(); ...
}

import {Location} from "angular2/router";

 constructor(route: ActivatedRoute) {
   route.snapshot.params; // active route's params

   route.snapshot.data; // active route's resolved data

   route.snapshot.component; // active route's component

   route.snapshot.queryParams // The query parameters shared by all the routes
}
 

<a [routerLink]="/user" routerLinkActive="some class list">User</a>

<div routerLinkActive="some class list">
  <a [routerLink]="/user">User</a>
</div>

@RouteConfig([
  {
    path: '/home',    name: 'Home',    component: HomeComponent,
    data: {activeTab: 'home'},  useAsDefault: true
  }, {
    path: '/jobs',    name: 'Jobs',    data: {activeTab: 'jobs'},
    component: JobsComponent
  }
])

  <li role="presentation" [ngClass]="{active: isActive('home')}">
    <a [routerLink]="['Home']">Home</a>
  </li>
  <li role="presentation" [ngClass]="{active: isActive('jobs')}">
    <a [routerLink]="['Jobs']">Jobs</a>
  </li>

export class MainMenuComponent {
  router: Router;

  constructor(data: Router) {
    this.router = data;
  }

  isActive(tab): boolean {
    if (this.router.currentInstruction && this.router.currentInstruction.component.routeData) {
      return tab == this.router.currentInstruction.component.routeData.data['activeTab'];
    }
    return false;
  }
}

<input type="hidden" [routerLink]="'home'" routerLinkActive #home="routerLinkActive" />
<section *ngIf="home.isActive"></section>

<a
  (click)="bookmarks()"
  [class.active]="router.isActive('/string/path/'+you+'/need', false)" // <== you need this one. second argument 'false' - exact: true/false
  routerLinkActive="active"
  [routerLinkActiveOptions]="{ exact: true }"
>
  bookmarks
</a>

<li 
[class.active]=
"router.urlTree.contains(router.createUrlTree(['/SignIn', this.routeSegment]))">

import { Component, OnInit } from '@angular/core';
import { Routes, Router, ROUTER_DIRECTIVES } from '@angular/router';
import { LoginPage, AddCandidatePage } from './export';
import {UserService} from './SERVICES/user.service';

@Component({
  moduleId: 'app/',
  selector: 'my-app',
  templateUrl: 'app.component.html',
  styleUrls: ['app.component.css'],
  providers: [UserService],
  directives: [ROUTER_DIRECTIVES]
})

@Routes([
  { path: '/', component: AddCandidatePage },
  { path: 'Login', component: LoginPage }
])
export class AppComponent  { //implements OnInit

  constructor(private router: Router){}

  routeIsActive(routePath: string) {
     let currentRoute = this.router.urlTree.firstChild(this.router.urlTree.root);
     // e.g. 'Login' or null if route is '/'
     let segment = currentRoute == null ? '/' : currentRoute.segment;
     return  segment == routePath;
  }
}

<ul>
  <li [class.active]="routeIsActive('Login')"><a [routerLink]="['Login']" >Login</a></li>
  <li [class.active]="routeIsActive('/')"><a [routerLink]="['/']" >AddCandidate</a></li>
</ul>
<route-outlet></router-outlet>

import {containsTree} from '@angular/router/src/url_tree';
import {Router} from '@angular/router';

export function isRouteActive(router: Router, route: string) {
   const currentUrlTree = router.parseUrl(router.url);
   const routeUrlTree = router.createUrlTree([route]);
   return containsTree(currentUrlTree, routeUrlTree, true);
}

import {Router} from "@angular/router";

export class AppComponent{

    constructor(private router : Router){}

    routeIsActive(routePath: string) {
        return this.router.url == routePath;
    }
}

<div *ngIf="routeIsActive('/')"> My content </div>

<a [routerLink]="['/dashboard']" routerLinkActive="active">Dashboard</a>

@Pipe({
    name: "isRouteActive",
    pure: false
})
export class IsRouteActivePipe implements PipeTransform {

    constructor(private router: Router,
                private activatedRoute: ActivatedRoute) {
    }

    transform(route: any[], options?: { queryParams?: any[], fragment?: any, exact?: boolean }) {
        if (!options) options = {};
        if (options.exact === undefined) options.exact = true;

        const currentUrlTree = this.router.parseUrl(this.router.url);
        const urlTree = this.router.createUrlTree(route, {
            relativeTo: this.activatedRoute,
            queryParams: options.queryParams,
            fragment: options.fragment
        });
        return containsTree(currentUrlTree, urlTree, options.exact);
    }
}

    <ul class="navbar-nav mr-auto">
      <li class="nav-item" routerLinkActive="active">
        <a class="nav-link" routerLink="/home">Home</a>
      </li>
      <li class="nav-item" routerLinkActive="active">
        <a class="nav-link" routerLink="/about-us">About Us</a>
      </li>
      <li class="nav-item" routerLinkActive="active">
        <a class="nav-link " routerLink="/contact-us">Contact</a>
      </li>
    </ul>

 <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav">
      <li class="nav-item" [class.active] = "router.isActive('/dashboard')">
        <a class="nav-link" href="#">داشبورد <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item" [class.active] = "router.isActive(route.path)" *ngFor="let route of (routes$ | async)">
        <a class="nav-link" href="javascript:void(0)" *ngIf="route.childRoutes && route.childRoutes.length > 0"
          [matMenuTriggerFor]="menu">{{route.name}}</a>
        <a class="nav-link" href="{{route.path}}"
          *ngIf="!route.childRoutes || route.childRoutes.length === 0">{{route.name}}</a>
        <mat-menu #menu="matMenu">
          <span *ngIf="route.childRoutes && route.childRoutes.length > 0">
            <a *ngFor="let child of route.childRoutes" class="nav-link" href="{{route.path + child.path}}"
              mat-menu-item>{{child.name}}</a>
          </span>
        </mat-menu>
      </li>
    </ul>
    <span class="navbar-text mr-auto">
      <small>سلام</small> {{ (currentUser$ | async) ? (currentUser$ | async).firstName : 'کاربر' }}
      {{ (currentUser$ | async) ? (currentUser$ | async).lastName : 'میهمان' }}
    </span>
  </div>

export class AppComponent implements OnInit { 

currentUrl : string;

constructor(private _router : Router){
    this.currentUrl = ''
}

ngOnInit() {
    this._router.subscribe(
        currentUrl => this.currentUrl = currentUrl,
        error => console.log(error)
    );
}

isCurrentRoute(route : string) : boolean {
    return this.currentUrl === route;
 } 
}

<a [routerLink]="['Contact']" class="item" [class.active]="isCurrentRoute('contact')">Contact</a>

<ul class="nav nav-tabs">
    <li role="presentation" routerLinkActive="active">
        <a routerLink="./location">Location</a>
    </li>
    <li role="presentation" routerLinkActive="active">
        <a routerLink="./execution">Execution</a>
    </li>
</ul>

<li class="nav-item"
    [routerLinkActive]="['active']">
  <a class="nav-link"
     [routerLink]="['home']">Home
  </a>
</li>

import {Component} from 'angular2/core';
import {Router, RouteConfig, ROUTER_DIRECTIVES} from 'angular2/router';
import {HomeComponent} from './home.component';
import {LoginComponent} from './login.component';
import {FeedComponent} from './feed.component';

@Component({
  selector: 'my-app',
  template: `
    <ul class="nav nav-tabs">
      <li [class.active]="_r.isRouteActive(_r.generate(['Home']))">
        <a [routerLink]="['Home']">Home</a>
      </li>
      <li [class.active]="_r.isRouteActive(_r.generate(['Login']))">
        <a [routerLink]="['Login']">Sign In</a>
      </li>
      <li [class.active]="_r.isRouteActive(_r.generate(['Feed']))">
        <a [routerLink]="['Feed']">Feed</a>
      </li>
    </ul>`,
  styleUrls: ['app/app.component.css'],
  directives: [ROUTER_DIRECTIVES]
})
@RouteConfig([
  { path:'/', component:HomeComponent, name:'Home', useAsDefault:true },
  { path:'/login', component:LoginComponent, name:'Login' },
  { path:'/feed', component:FeedComponent, name:'Feed' }
])
export class AppComponent {
  title = 'My App';
  constructor( private _r:Router ){}
}

<style>
   .active{
       color:blue;
     }
</style>

  <a routerLink="/home" [routerLinkActive]="['active']">Home</a>
  <a routerLink="/about" [routerLinkActive]="['active']">About</a>
  <a routerLink="/contact" [routerLinkActive]="['active']">Contact</a>

 <a [routerLink]="['/home']" routerLinkActive="active">Home</a>
 <a [routerLink]="['/about']" routerLinkActive="active">About us</a>
 <a [routerLink]="['/contact']" routerLinkActive="active">Contacts</a>

<span class="" routerLink ="/some_path" routerLinkActive="class_Name">Value</span></a>