Use Payment Element across multiple processors

// Set your publishable key: remember to change this to your live publishable key in production
// See your keys here: https://dashboard.stripe.com/apikeys
const stripe = Stripe('pk_test_YVzIqUTwiCYcEXO1DPqDrM98');

const options = {
    mode: 'payment',
    amount: 1099,
    currency: 'usd',
    paymentMethodCreation: 'manual',
    // Fully customizable with appearance API.
    appearance: {
        theme: 'stripe'
    }
};

// Set up Stripe.js and Elements to use in checkout form
const elements = stripe.elements(options);

const paymentElementOptions = {
layout: "tabs",
};

// Create and mount the Payment Element
const paymentElement = elements.create('payment', paymentElementOptions);
paymentElement.mount('#payment-element');

const form = document.getElementById('payment-form');
const submitBtn = document.getElementById('submit');

const handleError = (error) => {
    const messageContainer = document.querySelector('#error-message');
    messageContainer.textContent = error.message;
    submitBtn.disabled = false;
}

form.addEventListener('submit', async (event) => {
    // We don't want to let default form submission happen here,
    // which would refresh the page.
    event.preventDefault();

    // Prevent multiple form submissions
    if (submitBtn.disabled) {
        return;
    }

    // Disable form submission while loading
    submitBtn.disabled = true;

    // Trigger form validation and wallet collection
    const { error: submitError } = await elements.submit();
    if (submitError) {
        handleError(submitError);
        return;
    }

    // Create the PaymentMethod using the details collected by the Payment Element
    const { error, paymentMethod } = await stripe.createPaymentMethod({
        elements,
        params: {
            billing_details: {
                name: 'John Doe',
            }
        }
    });

    if (error) {
        // This point is only reached if there's an immediate error when
        // creating the PaymentMethod. Show the error to your customer (for example, payment details incomplete)
        handleError(error);
        return;
    }

    // Call the ForwardingRequest endpoint on your server
    const res = await fetch("/create-forwarding-request", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
            paymentMethodId: paymentMethod.id,
        }),
    });
    const data = await res.json();

    // Handle the response or errors
    handleServerResponse(data);
});