splitelement.js

<form action="/charge" method="post" id="payment-form">
  <div class="card-errors"></div>

  <div class="form-row">
    <label for="cardNumber">
      <span>Card number</span>
    </label>
    <div id="cardNumber"></div>
  </div>

  <div class="form-row">
    <label for="cardExpiry">
      <span>Expiration</span>
    </label
    <div id="cardExpiry"></div>
  </div>

  <div class="form-row">
    <labe for="cardCvc">
      <span>CVC</span>
    </label>
    <div id="cardCvc"></div>
  </div>
  <input type="submit" class="submit" value="Submit Payment">
</form>

var card = elements.create('cardNumber');
var cvc = elements.create('cardCvc');
var expiry = elements.create('cardExpiry');

card.mount('#cardNumber');
cvc.mount('#cardCvc');
expiry.mount('#cardExpiry);