LoadingIndicator

For a quick demo, see this stackblitz

How to install

Install the package with the following script:

npm install @btapai/ng-loading-indicator

or

yarn add @btapai/ng-loading-indicator

How to use

Import the module into your main ngModule

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { LoadingIndicatorModule } from '@btapai/ng-loading-indicator';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    LoadingIndicatorModule.forRoot(), // place it into the imports array
  ],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

Add the loading-indicator component to your app.component template

<!-- add the component to the bottom of the file -->
<btp-loading-indicator></btp-loading-indicator>

Use the method decorators to start/stop the indicator.

import { Component } from '@angular/core';
import { startLoadingIndicator, stopLoadingIndicator } from '@btapai/ng-loading-indicator';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  @startLoadingIndicator()
  triggerLoadingIndicator() {
    setTimeout(this.triggerLoadingIndicatorStop.bind(this), 5000);
  }

  @stopLoadingIndicator()
  triggerLoadingIndicatorStop() {
    console.log('stopped');
  }
}

Customisation

By default the loading-indicator is a spinner, however, by providing a custom configuration, you can customise the result.

export const DEFAULT_CONFIG: LoadingIndicatorConfig = {
  size: 160, // size will determine the width and height of the indicator container (as a square)
  color: '#7B1FA2', // the color you want for your indicator's background
  overlayColor: 'rgba(100,100,100,0.3)', // the color you would like to use for the overlay
  indicatorComponent: SpinnerComponent, // By default it is a spinner
};

The package itself contains an EllipsisComponent, which can be used as a replacement to the spinner.

To do that, just provide a specified config file in your module

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { AppComponent } from './app.component';
import { LOADING_INDICATOR_CONFIG, LoadingIndicatorModule } from '@btapai/ng-loading-indicator';
import { AppRoutingModule } from './app.routing.module';
import { EllipsisComponent } from '@btapai/ng-loading-indicator';

@NgModule({
  declarations: [AppComponent],
  imports: [CommonModule, AppRoutingModule, LoadingIndicatorModule.forRoot()],
  providers: [
    {
      provide: LOADING_INDICATOR_CONFIG,
      useValue: {
        color: 'red',
        size: 160,
        indicatorComponent: EllipsisComponent,
      },
    },
  ],
})
export class AppModule {}

If you would like to use your own indicator component, make sure that your component is an entryComponent, and provide it in the config:

// component:
import { Component } from '@angular/core';

@Component({
  selector: 'app-loading-message',
  template: `<h1>Loading...</h1>`,
  styles: [``],
})
export class LoadingMessageComponent {}

// app module
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { AppComponent } from './app.component';
import { LOADING_INDICATOR_CONFIG, LoadingIndicatorModule } from '@btapai/ng-loading-indicator';
import { AppRoutingModule } from './app.routing.module';
import { LoadingMessageComponent } from './loading-message.component';

@NgModule({
  declarations: [AppComponent, LoadingMessageComponent],
  imports: [CommonModule, AppRoutingModule, LoadingIndicatorModule.forRoot()],
  entryComponents: [LoadingMessageComponent],
  providers: [
    {
      provide: LOADING_INDICATOR_CONFIG,
      useValue: {
        color: 'red',
        size: 160,
        indicatorComponent: LoadingMessageComponent,
      },
    },
  ],
})
export class AppModule {}

Future plans

In future releases, I'd like to provide more indicators in the package, and the ability to add any component as an indicator.