✍️ How to Integrate ngx-signature-pad in Your Angular App

In today’s web applications, digital signatures are becoming a standard requirement — whether you’re building a delivery app, a contract approval system, or a form submission workflow. One of the easiest ways to capture a user’s signature in Angular is by using ngx-signature-pad, a handy wrapper around the popular signature_pad library.

In this quick guide, I’ll walk you through integrating ngx-signature-pad step by step.

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✅ Prerequisites

Before getting started, make sure you have:

• Node.js & npm installed
• Angular CLI set up
• An existing Angular project (or create one using ng new)

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Step 1: Install the Library

Run this command inside your Angular project:

npm install ngx-signature-pad --save

This installs the wrapper that helps us use signature_pad easily in Angular components.

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Step 2: Import the Module

Next, open your main module file and add the NgxSignaturePadModule to your imports:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { NgxSignaturePadModule } from 'ngx-signature-pad';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    NgxSignaturePadModule
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}

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Step 3: Set Up the Component

Let’s update the component where you want the signature pad to appear:

import { Component, ViewChild } from '@angular/core';
import { SignaturePad } from 'ngx-signature-pad';

@Component({
  selector: 'app-signature',
  templateUrl: './signature.component.html',
  styleUrls: ['./signature.component.css']
})
export class SignatureComponent {
  @ViewChild('signaturePad') signaturePad!: SignaturePad;

  signaturePadOptions: object = {
    minWidth: 1,
    canvasWidth: 400,
    canvasHeight: 200
  };

  drawStart() {
    console.log('Started drawing');
  }

  drawComplete() {
    console.log('Drawing complete');
  }

  clearSign(): void {
    this.signaturePad.clear();
  }
}

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Step 4: Create the HTML Template

Now add the signature pad to your component template:

<div class="sign-field-container">
  <label>Signature</label>
  <div class="sign-pad">
    <span class="sign-place">X</span>
    <input type="button" class="sign-clear-btn" value="Clear" (click)="clearSign()" />
    <signature-pad
      class="d-block"
      [options]="signaturePadOptions"
      #signaturePad
      (onBeginEvent)="drawStart()"
      (onEndEvent)="drawComplete()"
    ></signature-pad>
  </div>
</div>

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Step 5: Style the Signature Pad

Feel free to adjust the CSS, but here’s a simple example to start:

.sign-pad {
  border: 2px solid #000;
  padding: 10px;
  width: 420px;
  background-color: #fff;
  position: relative;
}

.sign-clear-btn {
  margin-top: 10px;
  background-color: red;
  color: white;
  border: none;
  padding: 5px 10px;
  cursor: pointer;
}

.sign-place {
  position: absolute;
  top: 10px;
  left: 10px;
  font-weight: bold;
}

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Step 6: Run and Test 🚀

Launch your app using:

ng serve

Visit http://localhost:4200/ — you should now see a fully functional signature pad where users can draw and clear their signature.

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✅ Final Thoughts

That’s it! You’ve successfully integrated a digital signature pad into your Angular project using ngx-signature-pad. This can be a great addition to any form or user workflow where approvals, confirmations, or signatures are needed.

💡 Want to save the signature as an image and upload it to your backend? Let me know — I can show you how to convert the signature to a base64 image and send it via HTTP.

Happy coding! 🙌