target-offset.ts

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'nz-demo-anchor-target-offset',
  template: `
    <nz-anchor [nzTargetOffset]="targetOffset">
      <nz-link nzHref="#components-anchor-demo-basic" nzTitle="Basic demo"></nz-link>
      <nz-link nzHref="#components-anchor-demo-static" nzTitle="Static demo"></nz-link>
      <nz-link nzHref="#api" nzTitle="API">
        <nz-link nzHref="#nz-anchor" nzTitle="nz-anchor"></nz-link>
        <nz-link nzHref="#nz-link" nzTitle="nz-link"></nz-link>
      </nz-link>
    </nz-anchor>
  `
})
export class NzDemoAnchorTargetOffsetComponent implements OnInit {
  targetOffset?: number;

  ngOnInit(): void {
    this.targetOffset = window.innerHeight / 2;
  }
}