Hello Mior Ahmad Ridzuan A.,

Unfortunately I cannot help you with the use of custom code, but if you have any doubts or issues on how to add them in the pages you made with WebSite X5 you can ask me. You can also wait to see if someone of the community of Help Center can help you.

The variables you can use on the custom HTML payment code are the following ones which then are filled out automatically by the program:

[ORDER_NO]
[PRICE]
[NAME]
[LASTNAME]
[ADDRESS1]
[ADDRESS2]
[CITY]
[STATEREGION]
[COUNTRY]
[ZIPPOSTALCODE]
[EMAIL]
[PHONE]

Many thanks!

I am an amateaur at this and experimenting, but,

From Stripe Website:

<form action="/your-server-side-code" method="POST">
<script src="https://checkout.stripe.com/checkout.js" class="stripe-button"
data-key="pk_test_AeAtUZD2oMaKExhqUZNixzo0"
data-amount="999"
data-name="Demo Site"
data-description="Widget"
data-image="https://stripe.com/img/documentation/checkout/marketplace.png"
data-locale="auto"
data-zip-code="true"
data-currency="gbp">
</script>
</form>

You sign up for your own credentials in bold above and then I have used this:

Paste this in SHOPPING CART -> ORDER MANAGEMENT ->ADD PAYMENT TYPE LIST->TYPE-> PAY NOW CUSTOM CODE

<form action="/your-server-side-code" method="POST">
<script
  src="https://checkout.stripe.com/checkout.js" class="stripe-button"
  data-key="pk_test_AeAtUZD2oMaKExhqUZNixzo0"
  data-amount=[PRICE, 100, ###.@@]
  data-name="Your Store Name"
  data-description=[ORDER_NO]
  data-image="https://stripe.com/img/documentation/checkout/marketplace.png"
  data-locale="auto"
  data-zip-code="true"
  data-currency="gbp">
</script>
</form>

I am still testing, but hope this helps