Stripe Payment into Angular 4

payment.component.css

* {
  font-family: "Helvetica Neue", Helvetica;
  font-size: 15px;
  font-variant: normal;
  padding: 0;
  margin: 0;
}

html {
  height: 100%;
}

body {
  background: #E6EBF1;
  align-items: center;
  min-height: 100%;
  display: flex;
  width: 100%;
}

form {
  width: 480px;
  margin: 20px auto;
}

.group {
  background: white;
  box-shadow: 0 7px 14px 0 rgba(49,49,93,0.10),
              0 3px 6px 0 rgba(0,0,0,0.08);
  border-radius: 4px;
  margin-bottom: 20px;
}

label {
  position: relative;
  color: #8898AA;
  font-weight: 300;
  height: 40px;
  line-height: 40px;
  margin-left: 20px;
  display: block;
}

.group label:not(:last-child) {
  border-bottom: 1px solid #F0F5FA;
}

label > span {
  width: 20%;
  text-align: right;
  float: left;
}

.field {
  background: transparent;
  font-weight: 300;
  border: 0;
  color: #31325F;
  outline: none;
  padding-right: 10px;
  padding-left: 10px;
  cursor: text;
  width: 70%;
  height: 40px;
  float: right;
}

.field::-webkit-input-placeholder { color: #CFD7E0; }
.field::-moz-placeholder { color: #CFD7E0; }
.field:-ms-input-placeholder { color: #CFD7E0; }

button {
  float: left;
  display: block;
  background: #666EE8;
  color: white;
  box-shadow: 0 7px 14px 0 rgba(49,49,93,0.10),
              0 3px 6px 0 rgba(0,0,0,0.08);
  border-radius: 4px;
  border: 0;
  margin-top: 20px;
  font-size: 15px;
  font-weight: 400;
  width: 100%;
  height: 40px;
  line-height: 38px;
  outline: none;
}

button:focus {
  background: #555ABF;
}

button:active {
  background: #43458B;
}

.outcome {
  float: left;
  width: 100%;
  padding-top: 8px;
  min-height: 24px;
  text-align: center;
}

.success, .error {
  display: none;
  font-size: 13px;
}

.success.visible, .error.visible {
  display: inline;
}

.error {
  color: #E4584C;
}

.success {
  color: #666EE8;
}

.success .token {
  font-weight: 500;
  font-size: 13px;
}

payment.component.html

<form>
  <div class="group">
    <label>
      <span>Name</span>
      <input name="cardholder-name" class="field" placeholder="Jane Doe" />
    </label>
    <label>
      <span>Phone</span>
      <input class="field" placeholder="(123) 456-7890" type="tel" />
    </label>
  </div>
  <div class="group">
    <label>
      <span>Card</span>
      <div id="card-element" class="field"></div>
    </label>
  </div>
  <button type="submit">Pay $25</button>
  <div class="outcome">
    <div class="error" role="alert"></div>
    <div class="success">
      Success! Your Stripe token is <span class="token"></span>
    </div>
  </div>
</form>

payment.component.ts

import { Component, OnInit, EventEmitter, Output, Input } from '@angular/core';
declare var Stripe: any;

@Component({
    moduleId: module.id,
    selector: 'payment',
    templateUrl: 'payment.component.html',
    styleUrls: ['payment.component.css']
})

export class PaymentComponent implements OnInit {
    @Input() amount;
    stripe: any;
    card: any;
    @Output() token = new EventEmitter<any>();

    constructor() { }

    ngOnInit() { this.init(); }

    init() {
        var current = this;
        this.stripe = Stripe('');
        var elements = this.stripe.elements();

        var card = elements.create('card', {
            style: {
                base: {
                    iconColor: '#666EE8',
                    color: '#31325F',
                    lineHeight: '40px',
                    fontWeight: 300,
                    fontFamily: '"Helvetica Neue", Helvetica, sans-serif',
                    fontSize: '15px',

                    '::placeholder': {
                        color: '#CFD7E0',
                    },
                },
            }
        });
        card.mount('#card-element');
        card.on('change', function (event) {
            current.setOutcome(event);
        });
        
        document.querySelector('form').addEventListener('submit', function (e) {
            console.log("in submit")
            e.preventDefault();
            var form = document.querySelector('form')[0];
            console.log("in form",form)
            var extraDetails = {
                name: form.querySelector('input[name=cardholder-name]').value,
            };
            current.stripe.createToken(card, extraDetails).then(current.setOutcome);
        });
    }

    setOutcome(result) {
        var successElement = document.querySelector('.success');
        var errorElement = document.querySelector('.error');
        successElement.classList.remove('visible');
        errorElement.classList.remove('visible');

        if (result.token) {
            // Use the token to create a charge or a customer
            // https://stripe.com/docs/charges
            successElement.querySelector('.token').textContent = result.token.id;
            successElement.classList.add('visible');
        } else if (result.error) {
            errorElement.textContent = result.error.message;
            errorElement.classList.add('visible');
        }
    }
}