What is the method for initializing an HTMLElement variable outside of a function in an Angular component.ts file?

I am facing an issue where I want to declare HTMLElement variables accessible to all functions within a particular class. Despite my efforts, declaring it before the constructor and assigning its value inside the constructor is not working as expected. Strangely, when I declare and assign the variable within a specific function like `employeesClick()`, it works fine.

My goal is to avoid repeating the same code multiple times since I need to modify other buttons based on the one that was clicked.

Although there are no visible errors, nothing seems to happen. Can anyone guide me on how to achieve this?

export class HeaderComponent implements OnInit {

  projects:HTMLElement;
  constructor() { 
    this.projects=document.getElementById('projects');
  }

  ngOnInit() {
  }

  projectsClick(){
    this.projects.style.color="#DEA731";
  }
  employeesClick(){
    var employees : HTMLElement = document.getElementById('employees');
    employees.style.color="#DEA731";
  }
}

Answer №1

If you want to access elements in your Angular component, you can make use of the @ViewChild directive. This allows you to create a reference to an element in your template and manipulate it in your TypeScript file.

For instance, in your HTML code:

<button #btn> ... </button>

In your TypeScript file:

export class HeaderComponent implements OnInit {

@ViewChild('btn') buttonRef: ElementRef;

...
someMethod(){
  // You can now modify properties of the referenced button element
  this.buttonRef.nativeElement.style.color = "#aaa";
}

The buttonRef variable is accessible throughout the class for any required operations.
Ensure to import ViewChild and ElementRef from @angular/core;

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