Stripe Angular Integration with Node.js, Express & TypeScript

In this tutorial, you will learn about Stripe Angular integration. Basically, we will integrate the Stripe payment gateway inside a project that is built using Angular 13, Node.js, Express, and TypeScript.

I have provided the complete source code of the Stripe Angular integration example in this article.

Stripe Angular Integration Example Source Code

We start this project by creating a new Angular app inside the folder named “client”.

mkdir client

cd client

ng new sampletestapp

Now open app.module.ts file and copy/paste the following code to import the httpclient module.

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { HttpClientModule } from '@angular/common/http';


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

Its time to design an HTML template for our Stripe Angular integration example app. So, open the app.component.html file and copy/paste the following code into it.

app.component.html

<h2>Angular Stripe Checkout Example</h2>

<button (click)="makePayment(15)">Pay With Stripe</button>

<div *ngIf="success">
  <h1>Your Payment is complete successfully</h1>
</div>
<div *ngIf="failure">
    <h1>Some Error is taken place inside the payment</h1>
</div

Here’s a screenshot of how the template looks.

Now open the app.component.ts file and copy/paste the following code into it.

app.component.ts

Important Note: On line # 24, replace ###yourkey### text with your actual Stripe API key.

import { Component } from '@angular/core';
import { CheckoutService } from './services/checkout.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  paymentHandler: any = null;

  success: boolean = false
  
  failure:boolean = false

  constructor(private checkout: CheckoutService) {}

  ngOnInit() {
    this.invokeStripe();
  }

  makePayment(amount: number) {
    const paymentHandler = (<any>window).StripeCheckout.configure({
      key: '###yourkey###',
      locale: 'auto',
      token: function (stripeToken: any) {
        console.log(stripeToken);
        paymentstripe(stripeToken);
      },
    });

    const paymentstripe = (stripeToken: any) => {
      this.checkout.makePayment(stripeToken).subscribe((data: any) => {
        console.log(data);
        if (data.data === "success") {
          this.success = true
        }
        else {
          this.failure = true
        }
      });
    };

    paymentHandler.open({
      name: 'Edopedia.com Payment',
      description: 'Some sample description of product',
      amount: amount * 100,
    });
  }

  invokeStripe() {
    if (!window.document.getElementById('stripe-script')) {
      const script = window.document.createElement('script');
      script.id = 'stripe-script';
      script.type = 'text/javascript';
      script.src = 'https://checkout.stripe.com/checkout.js';
      script.onload = () => {
        this.paymentHandler = (<any>window).StripeCheckout.configure({
          key: '###yourkey###',
          locale: 'auto',
          token: function (stripeToken: any) {
            console.log(stripeToken);
          },
        });
      };

      window.document.body.appendChild(script);
    }
  }
}

Now we are ready to carry out the payment. So, lets make a new service using the below command which will actually make the POST request to the backend.

ng g s services/checkout

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class CheckoutService {

  constructor(private http: HttpClient) { }
  
  makePayment(stripeToken: any): Observable<any>{
    const url = "http://localhost:5000/checkout/"

    return this.http.post<any>(url,{token:stripeToken})
  }
}

Here we are making the POST request to the backend which does not exist yet. So, let’s create the backend for our Stripe Angular integration app using Node.js and Express.

First of all, make a new directory to hold our backend files. For the sake of this tutorial, I name it “server”.

mkdir server

cd server

Initialize the project.

npm init -y

Now we will install the required packages from npm.

npm i express

npm i cors

npm i stripe

index.js

Important Note:

On line # 6, replace ###stripe_secret_key### with your actual Stripe secret key. You will get it from the Stripe dashboard.
On line # 17, replace ###your_email### with your real email.

const express = require("express");
const bodyparser = require('body-parser')
const app = express();
app.use(bodyparser.urlencoded({ extended: false }))
app.use(bodyparser.json())
const stripe = require("stripe")("###stripe_secret_key###");
const cors = require('cors')

app.use(cors())

app.post('/checkout', async(req, res) => {
    try {
        console.log(req.body);
        token = req.body.token
      const customer = stripe.customers
        .create({
          email: "###your_email###",
          source: token.id
        })
        .then((customer) => {
          console.log(customer);
          return stripe.charges.create({
            amount: 1000,
            description: "Test Purchase using express and Node",
            currency: "USD",
            customer: customer.id,
          });
        })
        .then((charge) => {
          console.log(charge);
            res.json({
              data:"success"
          })
        })
        .catch((err) => {
            res.json({
              data: "failure",
            });
        });
      return true;
    } catch (error) {
      return false;
    }
})

app.listen(5000, () => {
    console.log("App is listening on Port 5000")
})

Project Screenshots

Here, you can use the following Stripe demo cards for testing.

Number	Brand	CVC	Date
4242424242424242	Visa	Any 3 digits	Any future date
5555555555554444	Mastercard	Any 3 digits	Any future date