Error: `__WEBPACK_IMPORTED_MODULE_1_signature_pad__` does not function as a constructor

I recently discovered the angular2-signature-pad library for capturing signatures in my Angular project. I attempted to integrate the library using the following steps:

// in .module.ts file
import {SignaturePadModule} from "angular2-signature-pad";
@NgModule({
  declarations: [
    AddProgressNotePage,
  ],
  imports: [
    IonicPageModule.forChild(AddProgressNotePage),
    SignaturePadModule // Signature Module
  ]
})

// in .ts file   
import 'signature_pad';

   // in .html file
   <ion-row>
    <signature-pad 
        (onSave)="onSaveHandler($event)" 
        (onClear)="onClearHandler()" 
        [width]="width" 
        [height]="height" 
        [hideFooter]="noFooter" 
        [label]="label">
    </signature-pad>
   </ion-row>

Unfortunately, I encountered the error message: Error: Uncaught (in promise): TypeError: WEBPACK_IMPORTED_MODULE_1_signature_pad is not a constructor. https://i.sstatic.net/u08BE.png

In searching for a solution, I came across another similar issue on Stack Overflow which suggested installing the package below.

npm install --save @types/signature_pad

However, even after installing this package, I still encountered the same error. It seems like there might be a crucial step that I am missing in order to successfully use the signature pad functionality. Any guidance on resolving this issue would be greatly appreciated.

Answer №1

The angular2-signature-pad library is specifically designed for Angular 2 and is compatible with Angular CLI. However, Ionic utilizes a different webpack approach which is not supported by this library.

For this reason, I have opted to use a different module called angular2-signaturepad in order to achieve the desired functionality.

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