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Angular 5 : Allow trailing slash in routes – SEO

I’m updating an old website with Angular, and one of the requirements I have to meet is that all routes should remain the same as they were (For SEO purposes).

Many of the old website’s routes finish with a slash (Like /my/route/), and some of them finish with a .html, like /my/route.html.

The issue is that routerLink deletes the final slash in every route finishing by a slash (My route is now /my/route).

How can I make routerLink to keep the trailing slash ?

A light example can be seen here : AngularTrailingSlash.

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5

Answers


  1. 0

    I added below to your app.module.ts

    import {Location, PathLocationStrategy} from '@angular/common';


const _orig_prepareExternalUrl = PathLocationStrategy.prototype.prepareExternalUrl;

PathLocationStrategy.prototype.prepareExternalUrl = function(internal) {
  const url = _orig_prepareExternalUrl.call(this, internal);

  if (url === '') {
    return url;
  }

  console.log('For ' + internal + ' we generated ' + url);
  if (url.endsWith('.html')) {
      return url;
  }

  if (url.endsWith('/')) {
    return url;
  }


  return url + '/';

};

Location.stripTrailingSlash = function (url) {
    const /** @type {?} */ match = url.match(/#|?|$/);
    const /** @type {?} */ pathEndIdx = match && match.index || url.length;
    const /** @type {?} */ droppedSlashIdx = pathEndIdx - (url[pathEndIdx - 1] === '/' ? 1 : 0);
    const first = url.slice(0, droppedSlashIdx);
    const last = url.slice(pathEndIdx);

    if (first.endsWith('.html')) {
        return first + last;
    }

    return first + '/' + last;

};

    And it now works for me with a trailing slash when .html is not there

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  2. 0

    Add this code in the main.ts file to keep trailing slash in the routerLink.

    import { Location } from '@angular/common';
const __stripTrailingSlash = (Location as any).stripTrailingSlash;
(Location as any).stripTrailingSlash = function _stripTrailingSlash(url: string): string {
  return /[^/]/$/.test(url) ? url : __stripTrailingSlash(url);
}

// import main ng module
// bootstrap on document ready
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  3. 0

    Try with Location class extends in AppModule like this:

    app.module.ts:

    import { Injectable } from '@angular/core';
import { Location } from '@angular/common';

@Injectable()
export class UnstripTrailingSlashLocation extends Location {
  public static stripTrailingSlash(url: string): string {
    return url;
  }
}
Location.stripTrailingSlash = UnstripTrailingSlashLocation.stripTrailingSlash;

@NgModule({
            ...
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  4. 0

    Even more improved code (based on code from Umesh).

    Add on top of main.ts:

    import { Location } from "@angular/common";
// Prevent stripping of trailing slash
Location.stripTrailingSlash = function stripTrailingSlashNew(url: string) {
  return url;
};
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  5. 0

    Below code worked for me:

    export const contactUsRoutes: Routes = [
    {
        path: 'contact-us/.', component: ContactUsComponent
    }
];

    .
    .

    <a [routerLink]="['/contact-us/.']">Contact us</a>

    And add below code in your main.ts:

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

const __stripTrailingSlash = (Location as any).stripTrailingSlash;
(Location as any).stripTrailingSlash = function _stripTrailingSlash(url: string): string {
  const queryString$ = url.match(/([^?]*)?(.*)/);
  if (queryString$[2].length > 0) {
    return /[^/]/$/.test(queryString$[1]) ? queryString$[1] + '.' + queryString$[2] : __stripTrailingSlash(url);
  }
  return /[^/]/$/.test(url) ? url + '.' : __stripTrailingSlash(url);
};

    I have referred below link for this solution:

    https://stackblitz.com/github/ssatz/Angular5-Preserve-Trailing-Slash

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