Reducing image file sizes in Ionic 3

I have been struggling to compress an image client-side using Ionic 3 for the past couple of days. I have experimented with:

ng2-img-max - encountered an error when utilizing the blue-imp-canvas-to-blob canvas.toBlob() method (which is a dependency of ng2-img-max). It only provided me with information about the line where the error occurred. I believe that creating an HTMLCanvasElement in Ionic is not feasible due to some complications with webworkers.

Ahdin - JS library
JIC - JS library
TinyJPG - npm module

All these options presented different errors, and after investigating further, I realized that it was because the libraries/modules were not compatible with Ionic 3. In many cases, the issue seemed to be related to the HTMLCanvasElement.

I also attempted the solution mentioned in this post - however, adjusting the quality variable did not affect the image size.

Has anyone managed to successfully compress images client-side using Ionic 3? If so, how did you accomplish this?

javascriptimagetypescriptionic-frameworkcompression

Answer №1

Consider using the CameraOptions in conjunction with the camera plugin.

const options: CameraOptions = {
        quality: 20,
        targetWidth: 600,
        targetHeight: 600,
        destinationType: this.camera.DestinationType.DATA_URL,
        encodingType: this.camera.EncodingType.PNG,
        mediaType: this.camera.MediaType.PICTURE,
        sourceType: this.camera.PictureSourceType.PHOTOLIBRARY,
        allowEdit: true // please note that this may not work on all devices
}

Answer №2

I've recently started using ngx-image-compress

import { NgxImageCompressService } from "ngx-image-compress";

constructor(public imageCompress: NgxImageCompressService) { }

private reduceFileSize() {
      this.imageCompress.compressFile(data, '', 50, 50).then(result => {
         this.updatedImageData = result;
      })
}

Experiment with the settings, or create a loop for compressing images to achieve your desired outcome :)

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