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Getting started with Angular Spinner component

05 Oct 2022 / 4 minutes to read

This section explains the steps to create a simple Spinner and configure its functionalities in Angular.

Getting Started with Angular CLI

The following section explains the steps required to create a simple angular-cli application and how to configure the `Spinner’.

Prerequisites

To get started with Syncfusion Angular UI Components, make sure that you have compatible versions of Angular and TypeScript.

  • Angular : 4+
  • TypeScript : 2.6+

Setting up an Angular project

Angular provides an easiest way to setup project using Angular CLI Angular CLI tool.

Install the CLI application globally in your machine.

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  npm install -g @angular/cli

Create a new application

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  ng new syncfusion-angular-app

Once you have executed the above command you may ask for following options,

  • Would you like to add Angular routing?
  • Which stylesheet format would you like to use?

By default, it install the CSS style base application. To setup with SCSS, pass —style=SCSS argument on create project.

Example code snippet.

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  ng new syncfusion-angular-app --style=SCSS

Use below command to Navigate into the created project folder.

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  cd syncfusion-angular-app

Installing Syncfusion Popups package

Syncfusion packages are distributed in npm as @syncfusion scoped packages. You can get all the Angular Syncfusion package from npm link.

Currently, Syncfusion provides two types of package structures for Angular components,

  1. Ivy library distribution package format
  2. Angular compatibility compiler(Angular’s legacy compilation and rendering pipeline) package.

Ivy library distribution package

Syncfusion Angular packages(>=20.2.36) has been moved to the Ivy distribution to support the Angular Ivy rendering engine and the package are compatible with Angular version 12 and above. To download the package use the below command.

Add @syncfusion/ej2-angular-popups package to the application.

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npm install @syncfusion/ej2-angular-popups --save

Angular compatibility compiled package(ngcc)

For Angular version below 12, you can use the legacy (ngcc) package of the Syncfusion Angular components. To download the ngcc package use the below.

Add @syncfusion/ej2-angular-popups@ngcc package to the application.

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npm install @syncfusion/ej2-angular-popups@ngcc --save

To mention the ngcc package in the package.json file, add the suffix -ngcc with the package version as below.

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@syncfusion/ej2-angular-popups:"20.2.38-ngcc"

Note: If the ngcc tag is not specified while installing the package, the Ivy Library Package will be installed and this package will throw a warning.

Adding CSS reference

The following CSS files can be referenced in [src/styles.css] file.

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   @import '../node_modules/@syncfusion/ej2-angular-popups/styles/material.css';

The Custom Resource Generator (CRG) is an online web tool, which can be used to generate the custom script and styles for a set of specific components. This web tool is useful to combine the required component scripts and styles in a single file.

Adding Spinner

Initialize the Spinner using “createSpinner” method and show/hide the spinner using “showSpinner” and “hideSpinner” methods accordingly. Set the target to the spinner to render it based on specific target.

The following steps explains you on how to create and how to show/hide your Spinner.

  • Import the “createSpinner” method from “ej2-popups” library into your file as shown in below.
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import { createSpinner } from '@syncfusion/ej2-angular-popups';
  • Show and hide this spinner by using “showSpinner” and “hideSpinner” methods for loading in your page and import them in your file as shown in below.
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import { showSpinner, hideSpinner } from '@syncfusion/ej2-popups';

Create the Spinner globally

The Spinner can be render globally in a page using public exported functions of the “ej2-popups” package.

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import { showSpinner, hideSpinner } from '@syncfusion/ej2-angular-popups';
Source
Preview
app.component.ts
app.module.ts
main.ts
index.css
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import { Component } from '@angular/core';
import { createSpinner, showSpinner, hideSpinner } from '@syncfusion/ej2-angular-popups';

@Component({
  selector: 'app-container',
  template: `<div id="container"></div>`
})
export class AppComponent {
  constructor() {}

  ngAfterViewInit() {
//createSpinner() method is used to create spinner
createSpinner({
  // Specify the target for the spinner to show
  target: document.getElementById('container')
});

// showSpinner() will make the spinner visible
showSpinner(document.getElementById('container'));

setInterval(function(){
  // hideSpinner() method used hide spinner
  hideSpinner(document.getElementById('container'));
}, 100000);
  }
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        FormsModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [
    ]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
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#loader {
    color: #008cff;
    height: 40px;
    width: 30%;
    position: absolute;
    top: 45%;
    left: 45%;
}

#container {
    height: 100%;
    height: 100px;
}

#wrapper {
    margin: 0 auto;
    padding-top: 20px;
}