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Cannot Save Image in the SaveAsBlob


I'm trying to work on the new control, so far so good, now once I want to get the image, I'm using the saveAsBlob, 

after debugging it, in the signature-base file, the getBlob is calling 

 return this.getBlob(this.canvasContext.canvas.toDataURL('image/png'));

and the  canvasContext is undefined 

4 Replies 1 reply marked as answer

AM Abdul Mounem October 25, 2022 11:20 PM


Any ideas on this issue?

YA YuvanShankar Arunagiri Syncfusion Team October 26, 2022 12:36 AM

Hi Abdul,

We have checked your reported query and for clarification, saveAsBlob method was not for image editor component. its from signature component. Image editor component derived from signature component, so it shows the signature methods to image editor component. we will resolve this type of issue in our upcoming patch release. Now we have prepared the sample based on your requirement. Please refer the below code snippet and sample link. we can achieve your requirement by using the getImageData and putImageData method of the image editor.


async saveWorkaround() {

    var imageData = this.imgObj.getImageData();

    var canvas = document.createElement('canvas');

    var ctx = canvas.getContext('2d');

    canvas.width = imageData.width;

    canvas.height = imageData.height;


    var base64Url = canvas.toDataURL();


    const blob = await new Promise((resolve=>

      canvas.toBlob((b=> resolve(b))


    const url = URL.createObjectURL(blob);



Sample link: https://stackblitz.com/edit/sk5dlm?file=index.js

Could you please check the sample and get back to us, if you need any further assistance on this.


YuvanShankar A

Marked as answer

AM Abdul Mounem October 26, 2022 12:41 AM

Thanks a lot for the support, for now I can use the provided example, and later on I will updated base on the new update

YA YuvanShankar Arunagiri Syncfusion Team October 27, 2022 03:39 AM

You are welcome, Abdul. We are happy to hear that your requirement has been fulfilled. Please get back to us if you need any further assistance on this.

Best Regards,

YuvanShankar A

If that post is helpful, please consider accepting it as the solution so that other members can locate it more quickly.

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