如何通过 console.log 将 css 文件中的值显示到控制台

Question

in this tutorial

https://www.tektutorialshub.com/angular/custom-directive-in-angular/

the directive works as expected. however i would like to display the value of the color set on the console via

console.log

please have a look at my attempt in the code posted below, i used

    console.log(this.ttClass);//<---my attempt. it did not work
    

inside OnInit() but it did not work

please let me know how to display the value of the color from the css file on the console

app.component.ts :

import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'ngDirective2';
}

tt-class.directive.ts :

import { Directive, ElementRef, Input, OnInit } from '@angular/core'
@Directive({
  selector: '[ttClass]'
})
export class TtClassDirective implements OnInit{

  @Input() 
  ttClass : string  ="";

  ngOnInit() {
    this.el.nativeElement.classList.add(this.ttClass);
    console.log(this.ttClass);//<---my attempt. it did not work
  }
  constructor(private el: ElementRef) { }

}

app.coponent.html :

<button [ttClass]="'blue'">Click Me</button>

app.coponent.css :

.blue {
background-color: lightblue;

}

app.component.html :

<h1 my-error>Hello {{name}}</h1>
<h2 *myCustomIf="condition">Hello {{name}}</h2>
<button (click)="condition = !condition">Click</button>

image :

Answer 1

Working solution: https://stackblitz.com/edit/angular-jcia4c?file=src%2Fapp%2Ftt-class.directive.ts

Also, styles should ALWAYS be modified via Renderer2 in angular and not by directly accessing the nativeElement .