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angulartypescriptroutesrouterlink

Why routerLink and router.navigate() act differently?


When using this code in HTML:

 <button [routerLink]="[{ outlets: { flow: ['step1'] } }]">click me to show step1</button>

it navigates correctly to '/child/(flow:step1)'!!!

When trying to use this code in Typescript:

this.router.navigate([{ outlets: { flow: ['step1'] } }]);

it trying to navigate to wrong path '/child(flow:step1)'!!!

It just missing the slash.

Service:

import { Injectable } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
import { EventBusService } from '../../../services/eventBus/eventBus.service';
import { RouterService } from '../../../services/router.service';

@Injectable()
export class FlowManagerService {
  constructor(private router: Router, private r: ActivatedRoute, private     eventBus: EventBusService, private routerService: RouterService) {
  }

  initValidStep() {
    return     (parseInt(this.routerService.currentUrlName.substr(this.routerService.currentUrlName.indexOf('step'), 5).replace('step', ''), 10) === 1);
  }

  goToFirstStep() {
    this.router.navigate([{ outlets: { flow: ['step1'] } }], {relativeTo: this.r});

    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_NEXT);
    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_BACK);
  }

  next(params) {
    const currentStep = this.routerService.currentUrlName.substr(this.routerService.currentUrlName.indexOf('step'), 5).replace('step', '');

    this.eventBus.emit(this.eventBus.globalEvents.FLOW.FLOW_STEP_CHANGE, ({
      type: 'NEXT'
    }));
    this.router.navigate([{ outlets: { flow: [`step${parseInt(currentStep, 10) + 1}`, params] } }], {relativeTo: this.r});

    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_NEXT);
    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_BACK);

  }

  back(params) {
    const currentStep = this.routerService.currentUrlName.substr(this.routerService.currentUrlName.indexOf('step'), 5).replace('step', '');

    this.eventBus.emit(this.eventBus.globalEvents.FLOW.FLOW_STEP_CHANGE, ({
      type: 'NEXT'
    }));
    this.router.navigate([{ outlets: { flow: [`step${parseInt(currentStep, 10) - 1}`, params] } }], {relativeTo: this.r});

    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_NEXT);
    this.eventBus.off(this.eventBus.globalEvents.FLOW.FLOW_STEP_BACK);
  }

}

Here is the Module using the Service above:

import { NgModule } from '@angular/core';
import { RouterModule } from '@angular/router';
import { FlowManagerService } from './service/flowManager.service';
import { CommonModule } from '@angular/common';

@NgModule({
  providers: [FlowManagerService],
  imports: [
    RouterModule,
    CommonModule
  ]
})
export class FlowManagerModule {

}

Solution

  • Because routerLink uses relativeTo option implicitly:

    export class RouterLink {
      ...
      get urlTree(): UrlTree {
        return this.router.createUrlTree(this.commands, {
          relativeTo: this.route, <----
    

    You need to provide it explicitly in router.navigate:

    constructor(private route: ActivatedRoute)
    
    this.router.navigate([{ outlets: { flow: ['step1'] } }], {relativeTo: this.route});
    

    Here is plunker and the complete working code:

    import { Component, NgModule } from '@angular/core'
    import { BrowserModule } from '@angular/platform-browser'
    import { RouterModule, Routes, Resolve, Router, ActivatedRoute } from '@angular/router';
    import { APP_BASE_HREF } from '@angular/common';
    
    @Component({
      selector: 'my-app',
      template: `
          <div id='my-app'>
              <router-outlet></router-outlet>
          </div>
      `,
    })
    export class App {
      constructor() {
      }
    }
    
    @Component({
      selector: 'master-page',
      template: `
          <div id='master-page'>
              <div>Master Component</div>
              <button (click)='clickFirst()'>Inner Section 1</button>
              <button (click)='clickSecond()'>Inner Section 2</button>
              <router-outlet name='child'></router-outlet>
          </div>
      `
    })
    export class Master {
      constructor(private router: Router, private activeRouter: ActivatedRoute) {
      }
    
      clickFirst() {
        this.router.navigate([{outlets: {child: 'details1'}}], {relativeTo: this.activeRouter});
      }
    
    
      clickSecond() {
        this.router.navigate([{outlets: {child: 'details2'}}], {relativeTo: this.activeRouter});
      }
    }
    
    @Component({
      template: `
          <div>
              This content is in the "Inner" page (1)
          </div>
      `
    })
    export class Details1 {
      constructor() {
      }
    }
    
    @Component({
      template: `
          <div>
              This content is in the "Inner" page (2)
          </div>
      `
    })
    export class Details2 {
      constructor() {
      }
    }
    
    const routes: Routes = [
      {
        path: 'master',
        component: Master,
        children: [
          {
            path: 'details1',
            component: Details1,
            outlet: 'child'
          },
          {
            path: 'details2',
            component: Details2,
            outlet: 'child'
          }
        ]
      },
      {
        path: '',
        pathMatch: 'prefix',
        redirectTo: 'master'
      }
    ];
    
    @NgModule({
      imports: [BrowserModule, RouterModule.forRoot(routes)],
      declarations: [App, Master, Details1, Details2],
      providers: [{
        provide: APP_BASE_HREF,
        useValue: '/'
      }],
      bootstrap: [App]
    })
    export class AppModule {
    }