Using Angular 2+ to dynamically attach and detach from the mousemove event

Question

Using Angular 2+ to dynamically attach and detach from the mousemove event

I have experience binding to events using the HostListener decorator, as shown below:

  @HostListener('document:mousemove', ['$event'])
  onMousemove(event) {
    //Handling mouse movement.
  }

However, I am looking for a way to dynamically bind and unbind the mousemove event during different stages of a component's lifecycle. I am unsure of what this type of binding is referred to as and have been unable to find any information on it. Should I consider utilizing native JavaScript event binding instead?

angular typescript mouseevent

Answer 1

Answer №1

Web Design:

<div (mouseover)="toggleOverState()" 
     (mouseleave)="toggleLeaveState()">
         <span *ngIf="isMouseOver == true">hello mouseover</span>
         <span *ngIf="isMouseOver == false">hello mouseleave</span>
</div>

JavaScript:

isMouseOver : boolean = false;

toggleOverState(){
 this.isMouseOver = true;  
}

toggleLeaveState(){
 this.isMouseOver = false;  
}

Answer 2

Web Design:

<div (mouseover)="toggleOverState()" 
     (mouseleave)="toggleLeaveState()">
         <span *ngIf="isMouseOver == true">hello mouseover</span>
         <span *ngIf="isMouseOver == false">hello mouseleave</span>
</div>

JavaScript:

isMouseOver : boolean = false;

toggleOverState(){
 this.isMouseOver = true;  
}

toggleLeaveState(){
 this.isMouseOver = false;  
}

Answer 3

Answer №2

Declare an output variable as shown below.

 @Output() clickEvent = new EventEmitter();

Utilize this variable to emit the event as demonstrated below.

 this.clickEvent.emit({value:paramValue});

Invoke the click event where it needs to be added in an HTML element

 <HTMLElement (clickEvent) = "methodName()"></HTMLElement>

Answer 4

Declare an output variable as shown below.

 @Output() clickEvent = new EventEmitter();

Utilize this variable to emit the event as demonstrated below.

 this.clickEvent.emit({value:paramValue});

Invoke the click event where it needs to be added in an HTML element

 <HTMLElement (clickEvent) = "methodName()"></HTMLElement>

Using Angular 2+ to dynamically attach and detach from the mousemove event

Answer №1

Answer №2

Similar questions

Encountering a bug in Angular 11 while fetching data from the backend to display on the screen - facing an issue with trying to access property 'values' of an undefined variable

What is the reason behind TypeScript treating numbers as strings when adding them together?

Page Content Fails to Load Without Reloading

Tips for Embedding Icons Within a Data Grid Using Material UI and Implementing Them in Typescript

How can one avoid the use of an opening curly bracket in Angular?

Establish a set height for ngx-datatable component in Angular version 4

Issue: The login.component.html file failed to load

An easy guide to dynamically adding form controls specifically for checkboxes

Typescript - unexpected behavior when using imported JavaScript types:

What steps can be taken to modify the base URL of angular-in-memory-web?

(Angular 2/4/5/6) Implementing multiple inner subscribe methods along with a single outer subscribe method

The selected check icon does not appear in the console log

Receiving and extracting JSON values by subscribing in Angular

The expected React component's generic type was 0 arguments, however, it received 1 argument

organize the values based on their priority using reactjs

Eslint in VS Code encounters issues resolving paths within a monorepo

What is the best way to determine the appropriate generic type for this situation?

Understanding the Functions of Angular Providers and Implementing Them

Reversing a Firebase list in Angular 2 after inserting a new item: A step-by-step

Storing the mapping reference in an Object within MongoDB using TypeScript