Angular 14 ngx-image-compress Example to Compress Size of Multiple Images to Smaller Size in Typescript

Welcome folks today in this blog post we will be compressing size of multiple images to smaller size in typescript using the ngx-image-compress library. All the full source code of the application is shown below.

Get Started

In order to get started you need to make a new angular project using the below command

ng new sampleapp

cd sampleapp

And after that you need to install the below library using the below command

npm i ngx-image-compress

And after that you will see the below directory structure of the angular app as shown below

And now you need to go to app.component.html file and copy paste the following code

app.component.html

<header>
  <h1>ngx-image-compress demo</h1>
</header>
 
<hr />
 
<section>
  <button (click)="compressFile()">Upload and compress Image</button>
  <img *ngIf="imgResultBeforeCompress" [src]="imgResultBeforeCompress" alt="" />
  <img *ngIf="imgResultAfterCompress" [src]="imgResultAfterCompress" alt="" />
</section>
 
<hr />

<h1>ngx-image-compress demo</h1>

</header>

<hr />

<button (click)="compressFile()">Upload and compress Image</button>

</section>

<hr />

As you can see we have the simple button to compress images and we have attached the compressFile() method on button click. And then we are displaying the images before compress and after compress.

And now we need to go to app.component.ts file and copy paste the following code

app.component.ts

import { Component } from '@angular/core';
import {
  DataUrl,
  DOC_ORIENTATION,
  NgxImageCompressService,
  UploadResponse,
} from 'ngx-image-compress';
 
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss'],
})
export class AppComponent {
  imgResultBeforeCompress: DataUrl = '';
  imgResultAfterCompress: DataUrl = '';
  imgResultUpload: DataUrl = '';
 
  constructor(private imageCompress: NgxImageCompressService) {}
 
  compressFile() {
    return this.imageCompress
      .uploadFile()
      .then(({ image, orientation }: UploadResponse) => {
        this.imgResultBeforeCompress = image;
        console.warn('Size in bytes was:', this.imageCompress.byteCount(image));
 
        this.imageCompress
          .compressFile(image, orientation, 50, 50)
          .then((result: DataUrl) => {
            this.imgResultAfterCompress = result;
            console.warn(
              'Size in bytes is now:',
              this.imageCompress.byteCount(result)
            );
          });
      });
  }
 
  uploadFile() {
    return this.imageCompress
      .uploadFile()
      .then(({ image, orientation }: UploadResponse) => {
        this.imgResultUpload = image;
        console.warn('DOC_ORIENTATION:', DOC_ORIENTATION[orientation]);
        console.warn(
          `${image.substring(0, 50)}... (${image.length} characters)`
        );
      });
  }
}

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

import {

DataUrl,

DOC_ORIENTATION,

NgxImageCompressService,

UploadResponse,

} from 'ngx-image-compress';

@Component({

selector: 'app-root',

templateUrl: './app.component.html',

styleUrls: ['./app.component.scss'],

})

export class AppComponent {

imgResultBeforeCompress: DataUrl = '';

imgResultAfterCompress: DataUrl = '';

imgResultUpload: DataUrl = '';

constructor(private imageCompress: NgxImageCompressService) {}

compressFile() {

return this.imageCompress

.uploadFile()

.then(({ image, orientation }: UploadResponse) => {

this.imgResultBeforeCompress = image;

console.warn('Size in bytes was:', this.imageCompress.byteCount(image));

this.imageCompress

.compressFile(image, orientation, 50, 50)

.then((result: DataUrl) => {

this.imgResultAfterCompress = result;

console.warn(

'Size in bytes is now:',

this.imageCompress.byteCount(result)

);

});

}

uploadFile() {

return this.imageCompress

.uploadFile()

.then(({ image, orientation }: UploadResponse) => {

this.imgResultUpload = image;

console.warn('DOC_ORIENTATION:', DOC_ORIENTATION[orientation]);

console.warn(

`${image.substring(0, 50)}... (${image.length} characters)`

);

});

}

As you can see we are importing the ngx-image-compress library at the top and then we are using the imageCompress() method to upload and compress the multiple images.