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Mimics default browser behavior of fragment links in Angular applications.





Mimics default browser behavior of fragment links in Angular applications.
Allows applying changes in a scoped manner using a simple directive.
Supports smooth scroll behavior.

This library was generated with Angular CLI version 13.0.0.

Example use case

E.g. you have existing HTML content with a table of contents:

<h2>Table of contents</h2>
  <li><a href="#some-headline">Some Headline</a></li>
  <li><a href="#another-headline">Another Headline</a></li>

  <h2 id="some-headline">Some Headline</h2>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit.

    <a name="another-headline"></a>
    Another Headline
    Lorem ipsum dolor sit amet, consectetur adipisicing elit.

This table of contents does not work as expected in an Angular app.
Clicking one of the links would not adjust the scroll position.
Instead you'd trigger a navigation to the homepage.

Usually the solution requires manual changes to the original HTML content.
Also you'd typically need to handle click events or fragment changes somehow.
Probably you want a nice smooth scroll effect that works in all major browser.

This library gets the job done without changing any of the existing HTML contents.


  1. npm i @hettiger/ngx-fragment-link-faker --save
  2. Import the FragmentLinkFakerModule module
import { FragmentLinkFakerModule } from '@hettiger/ngx-fragment-link-faker';

  imports: [
    // …
  // …
// …


Simply add the mhFakeFragmentLinks directive to a wrapper element in your template.
In case you need to account for e.g. a fixed navbar simply provide a delta in px.

Example: <main mhFakeFragmentLinks [mhScrollTopDelta]="64"> … </main>

You might as well configure the scroll behavior to enable smooth scrolling:

Example: <main mhFakeFragmentLinks mhScrollBehavior="smooth"> … </main>

Smooth scroll behavior is not supported in all browsers at the time of writing.
However, you may simply add a polyfill for now:

npm i seamless-scroll-polyfill --save

// src/polyfills.ts

import { polyfill as polyfillSeamlessScroll } from "seamless-scroll-polyfill";

Brief example

<main mhFakeFragmentLinks [mhScrollTopDelta]="20" mhScrollBehavior="smooth">
  <h2>Table of contents</h2>
      <a href="#some-headline">Some Headline</a>
      <a href="#another-headline">Another Headline</a>
  <!-- … -->

Router Extra Options

Anchor scrolling may not work when you enable scrollPositionRestoration on the RouterModule. Make sure to also enable the anchorScrolling option and set an appropriate scrollOffset.

I.e. if you use scrollTopDelta: 64 or [mhScrollTopDelta]="64" set scrollOffset to [0, 64].

  imports: [RouterModule.forRoot(routes, {
    scrollPositionRestoration: 'enabled',
    anchorScrolling: 'enabled',
    scrollOffset: [0, 64],
  exports: [RouterModule]
export class AppRoutingModule {

In addition to these extra options you optionally need the following global styles for smooth scroll support:

html {
  scroll-behavior: smooth;

Demo application

Run npm run start to serve the demo application.

Global configuration

It's possible to provide global defaults for the scroll top delta and scroll behavior:

import { FAKE_FRAGMENT_LINKS_CONFIG, FakeFragmentLinksConfig } from 'ngx-fragment-link-faker';

  providers: [
      useFactory: (): FakeFragmentLinksConfig => ({ scrollTopDelta: 84, scrollBehavior: 'smooth' })
  // …
export class AppModule {}

Input arguments always take precedence over the global defaults you provide.

Code scaffolding

Run ng generate component component-name --project ngx-fragment-link-faker to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module --project ngx-fragment-link-faker.

Note: Don't forget to add --project ngx-fragment-link-faker or else it will be added to the default project in your angular.json file.


Run npm run build to build the project. The build artifacts will be stored in the dist/ directory.


Run npm run publish to publish the project.

Further help

To get more help on the Angular CLI use ng help or go check out the Angular CLI Overview and Command Reference page.

Adheres to / Uses


The NgxFragmentLinkFaker library is open-sourced software licensed under the MIT license.