The issue of Renderer2 not functioning properly in Angular 7 when using inheritance

I am facing an issue with accessing a DOM element and manipulating it in another class.
homeComponent.ts

   import{TableUtility} from "src/shared/table-utility"; 
   export class HomeComponent extends TableUtility{
   constructor(){super()}

homeComponent.html

<button (click)="toggleClass($event)"><img src="img.png"></button>

tableUtility.ts

import{Table} from "primeng/table";
import{Renderer2} from "@angular/core";

export class TableUtility{
constructor(public render:Renderer2)
togglClass(ev){
console.log(this.render.addClass(ev.target,"active");
}

Err:unable to read addClass of undefined

When I try to access Renderer2 within the home component, it works fine. Can someone explain this behavior and offer a solution?

Answer №1

It is essential to specify dependencies within the subclass constructor and then transfer them to the superclass using super():

export class HomePage extends FurnitureTool{
constructor(public paint:Painter){super(paint)}

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