Is there a way to toggle the visibility of the angular material toolbar at regular intervals?

Question

Is there a way to toggle the visibility of the angular material toolbar at regular intervals?

I'm currently experimenting with the CSS animation feature to display and conceal the angular material toolbar in this demonstration.

Inside the application component, the hide attribute is toggled at intervals as shown below:

  hide:boolean = false
  show() {
    this.hide = !this.hide;
    console.log(`Hide? ${this.hide}`)
  }
  constructor() {
    this.show.bind(this)
    setInterval(this.show, 2000)
  }

The respective CSS style for the mat-toolbar element is defined like this:

<mat-toolbar [ngClass]="hide ? 'hideToolbar' : 'showToolbar'"
             class="hideShowToolbar"><h2>Material Baseline</h2>
</mat-toolbar>

Despite using the ngClass directive, the toggle between hideToolbar and showToolbar does not work. Any ideas?

An alternative approach involving an Observable was also attempted:

Stackblitz

javascript css angular typescript

Answer 1

Answer №1

If I were to approach it, I'd do it in the following way:

export class SampleComponent implements OnInit{
  public isHidden: boolean;

  ngOnInit() {
    setInterval(() => {
      this.isHidden = !this.isHidden;
    }, 2000);
  }
}

To toggle a hidden class in the template:

<mat-toolbar [class.hidden]="isHidden" class="toggleToolbar">
<h2>Example Heading</h2>
</mat-toolbar>

Below is an example of a transition that animates the toolbar sliding in from the right:

mat-toolbar{
  position: fixed;
  top:10px;
  right: 10px;
  width: 420px;
  transition:right .25s linear;
  &.hidden{
    right: -420px;
  }
}

Answer 2

If I were to approach it, I'd do it in the following way:

export class SampleComponent implements OnInit{
  public isHidden: boolean;

  ngOnInit() {
    setInterval(() => {
      this.isHidden = !this.isHidden;
    }, 2000);
  }
}

To toggle a hidden class in the template:

<mat-toolbar [class.hidden]="isHidden" class="toggleToolbar">
<h2>Example Heading</h2>
</mat-toolbar>

Below is an example of a transition that animates the toolbar sliding in from the right:

mat-toolbar{
  position: fixed;
  top:10px;
  right: 10px;
  width: 420px;
  transition:right .25s linear;
  &.hidden{
    right: -420px;
  }
}

Answer 3

Answer №2

If you're looking to incorporate the rxjs library's interval function in your Angular component using the ngOnInit lifecycle hook, check out the code snippet below:

import { Component, OnInit } from '@angular/core';
import { interval } from 'rxjs';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
  hide:boolean = false;
  secondsCounter = interval(2000);
  
  show() {
    this.hide = !this.hide;
    console.log(`Hide? ${this.hide}`);
  }

  ngOnInit() {
    this.secondsCounter.subscribe(() => {
      this.show();
    });
  }
}

Check out the working DEMO here.

The code demonstrates subscribing to an empty response with an rxjs observable within the ngOnInit() method. The Reactivex/Rxjs library is a powerful tool for reactive programming and has been a key focus for the Angular developer team at Google to leverage its capabilities and engage the community.

To learn more about rxjs, explore these useful resources: https://angular.io/guide/rx-library https://www.youtube.com/watch?v=aYurQaN3RoE (highly recommended)

Answer 4

If you're looking to incorporate the rxjs library's interval function in your Angular component using the ngOnInit lifecycle hook, check out the code snippet below:

import { Component, OnInit } from '@angular/core';
import { interval } from 'rxjs';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
  hide:boolean = false;
  secondsCounter = interval(2000);
  
  show() {
    this.hide = !this.hide;
    console.log(`Hide? ${this.hide}`);
  }

  ngOnInit() {
    this.secondsCounter.subscribe(() => {
      this.show();
    });
  }
}

Check out the working DEMO here.

The code demonstrates subscribing to an empty response with an rxjs observable within the ngOnInit() method. The Reactivex/Rxjs library is a powerful tool for reactive programming and has been a key focus for the Angular developer team at Google to leverage its capabilities and engage the community.

To learn more about rxjs, explore these useful resources: https://angular.io/guide/rx-library https://www.youtube.com/watch?v=aYurQaN3RoE (highly recommended)

Is there a way to toggle the visibility of the angular material toolbar at regular intervals?

Answer №1

Answer №2

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