A guide on creating a custom component or service for enhancing the functionality of the ng4-loading spinner

My experience with ng4-loading-spinner in my project has been very positive.

You have the flexibility to customize ng4-loading-spinner to suit your needs. For example, you can adjust the timeout or template as desired.

<ng4-loading-spinner [threshold]="2000" [timeout]="4000" [template]="template" [zIndex]="9999"></ng4-loading-spinner>

However, if I want to modify some aspects of ng4-loading-spinner, I currently need to make those changes in every component that uses it.

Is there a way to create a separate component or service for customizing ng4-loading-spinner?

Answer №1

I once encountered a similar issue where I had to use a component multiple times in the application and bind specific configurations to it. Whenever there was a need to change these configurations, I had to manually go through the entire application to make the edits.

To solve this problem, I opted for using an interface called "NgLoadingConfigInterface":

export interface NgLoadingConfigInterface {
 threshold: 2000,
 timeout: 4000,
 zIndex: 9999,
}

By defining the common attributes in this interface, it made it easier to manage them across the application.

Whenever the "Ng4-loading" component is used, you can implement this interface as shown below:

@Component({
   ...
})
export class SomeComponent implements NgLoadingConfigInterface {
  ....
}

In the template, simply bind the attributes of the Ng4-loading component to the attributes defined in the interface.

<ng4-loading-spinner [threshold]="threshold" [timeout]="timeout" [zIndex]="zIndex">
<ng4-loading-spinner>

This approach allows you to update the values in the interface, subsequently reflecting the changes throughout the application.


Alternatively, you can encapsulate the component within another component and pass the configurable attributes using @Input annotations.

Answer №2

After creating a component, it successfully functions as intended.

spinner.component.ts :

import { Component, Input, OnInit, OnChanges } from '@angular/core';

import { Ng4LoadingSpinnerService } from 'ng4-loading-spinner';

@Component({
  selector: 'app-spinner',
  templateUrl: './spinner.component.html',
  styleUrls: ['./spinner.component.css']
})
export class SpinnerComponent implements OnInit, OnChanges {

  @Input() isDisplay: boolean = false;

  constructor(private spinnerService: Ng4LoadingSpinnerService) { }

  ngOnInit() {

  }
  //----------------------------------------------------------------------------
  ngOnChanges(){

    if(this.isDisplay){          
      this.spinnerService.show();
    }else{       
      this.spinnerService.hide();
    }
  }
}

spinner.component.html :

<ng4-loading-spinner [threshold]="2000" [timeout]="40000" [zIndex]="9999"></ng4-loading-spinner>

This component can now be implemented in other parts of the application, like so:

this.isDisplaySpinner = true;
    this.http.get(GLOBAL['CONFIG_URL'])
        .subscribe(data => {
            this.isDisplaySpinner = false;
        });

In your HTML file:

<app-spinner [isDisplay]="isDisplaySpinner"></app-spinner>

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