在 Angular 中，如何使用 `href` 导航到相对路径？

Question

I am using Ionic with Angular (ie and @angular/router ), but I believe that this question is also relevant to Angular without Ionic.

How can I navigate to a relative folder using href ?

I have this structure:

(root)
..A
....B1
....B2

When I navigate to /A/B1 - the B1 component is rendered. In it, I have this HTML:

<ios-button href="../B2">Click Me</ios-button>

I expect a button click to navigate to /A/B2 , but instead, it navigates to /B2 .

I also tried href="./../B2" but it gives the same result.

If I use the full path ( href="/A/B2" ) then it works.

How do I achieve my expected result with the partial (ie relative) path?

Answer 1

You have an option to implement it like this, handling redirection inside your Component

More info on Angular's specifying-a-relative-route documentation

@Component({...})
export class TestComponent {

   constructor(
      private router: Router
      private route: ActivatedRoute
   ) {}

   navigateTo(path: string): void {
       this.router.navigate([path], { relativeTo: this.route });        
   }
}

With this in place { relativeTo: this.route } and if you have a path ../B2 , you're telling Angular that from this current route, go 1-step backward and go to B2

Mock Parent Route: http://localhost:4200/parent

Example #1

// This will be http://localhost:4200/parent/B2
this.router.navigate(['B2'], { relativeTo: this.route });

Example #2

// This will be http://localhost:4200/B2
// As this goes up one level
this.router.navigate(['../B2'], { relativeTo: this.route });

---

NOTE:

• When dealing with route redirection, it's best to use [routerLink]="" instead of href inside your template

  • Accessing levels up <a [routerLink]="[../B2]">B2</a>
  • If one level only, <a [routerLink]="'B2'">B2</a> with single quote inside

• Or if you'll handle redirection in your component, you'll use Router from @angular/router

---

Have created a Stackblitz Demo for your reference