check the solution here using a directive
for spyScroll
. It listens to scroll event on the page and highlights the current section in view.
import { Directive, Injectable, Input, EventEmitter, Output, ElementRef, HostListener } from '@angular/core';
@Directive({
selector: '[scrollSpy]'
})
export class ScrollSpyDirective {
@Input() public spiedTags = [];
…
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