How does Stripe conceal data input by users into Stripe-element objects? - stripe-payments

Question

var stripeElements = function (publicKey, setupIntent) {
var stripe = Stripe(publicKey);
var elements = stripe.elements();
// Element styles
var style = {
base: {
fontSize: '16px',
color: '#32325d',
fontFamily:
'-apple-system, BlinkMacSystemFont, Segoe UI, Roboto, sans-serif',
fontSmoothing: 'antialiased',
'::placeholder': {
color: 'rgba(0,0,0,0.4)',
},
},
};
var card = elements.create('card', { style: style });
console.log(card); // returns a "t" object
card.mount('#card-element');
// Element focus ring
card.on('focus', function () {
var el = document.getElementById('card-element');
el.classList.add('focused');
});
card.on('blur', function () {
var el = document.getElementById('card-element');
el.classList.remove('focused');
});
// Handle payment submission when user clicks the pay button.
var button = document.getElementById('submit');
button.addEventListener('click', function (event) {
event.preventDefault();
changeLoadingState(true);
var email = document.getElementById('email').value;
stripe
.confirmCardSetup(setupIntent.client_secret, {
payment_method: {
card: card,
billing_details: { email: email },
},
})
.then(function (result) {
if (result.error) {
changeLoadingState(false);
var displayError = document.getElementById('card-errors');
displayError.textContent = result.error.message;
} else {
// The PaymentMethod was successfully set up
orderComplete(stripe, setupIntent.client_secret);
}
});
});
};
Stripe uses the above stripe.confirmCardSetup method to create a setupIntent object. This object can be used later to issue a charge.
In the above example, a Stripe "element" is used to create a "card" (the credit card) input. After I submit this info., this card-element gets attached to the object passed into the stripe.confirmCardSetup method, but when I attempt to console log the card object and find the CC data that was just input, I don't see it and I've been through every attribute.
How does Stripe conceal this info.?