Getting Started

Once you have a session id you can simply initialize the Checkout modal by using its constructor:

• Include the Billwerk+ JavaScript SDK
  HTML
  <script src="https://checkout.reepay.com/checkout.js"></script>
• Open Checkout as a modal
  Overlay Initialise
  var rp = new Reepay.ModalCheckout(' YOUR SESSION ID HERE ');

You can test if the script is properly loaded by inspecting the Billwerk+ object in the console.

Notice that for Subscription sessions, the method name is ModalSubscription.

Overlay initialize for subscription sessions

var rp = new Reepay.ModalSubscription(' YOUR SESSION ID HERE ');

Events

The modal fires a number of events which your application may subscribe to. In order to set up an event handler, use the .addEventHandler function, and pass it the type of event and the callback function:

Overlay Events

var rp = new Reepay.ModalCheckout(' YOUR SESSION ID HERE ');

rp.addEventHandler(Reepay.Event.Accept, function(data) {
	console.log('Success', data);
});

The possible event types which may be subscribed to are:

Overlay Event Types

Reepay.Event.Accept
Reepay.Event.Error
Reepay.Event.Cancel
Reepay.Event.Close

Each event responds with a signature of type:

Overlay Response Signature

{
  id: string;     // The current session id
  invoice: string;    // Invoice/charge handle
  customer: string;   // Customer handle
  subscription: string;   // Subscription handle
  payment_method: string; // Payment method if a new one is created
  error: string;    // The error code
}

To unsubscribe to events, use the .removeEventHandler method with the given event handler:

Overlay Remove Event Handler

var rp = new Reepay.ModalCheckout(' YOUR SESSION ID HERE ');

rp.removeEventHandler(Reepay.Event.Accept);

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Caution

It is not mandatory to subscribe to events, however we strongly encourage it. The SDK will show helpful warnings in console if an un-handled even is fired (with the exception of the Reepay.Event.Error).

Once you have set up the Reepay.ModalCheckout object, with the event hanlders necessary, you are good to go!

Preloading the Modal

As an alternative to both initializing and loading the modal only once the backend to backend call is done and a session id is available, the two steps may be done separately and at different times in your code.

By calling the constructor without a session id, the modal is initialized in the background, however will remain hidden until the .show function is called and passed the required session id.

Overlay Preloading Modal

// Step 1: Initialize
var rp = new Reepay.ModalCheckout();  // No session id given

// ... Backend to backend call ... 

// Step 2: Load the modal 
rp.show(' YOUR SESSION ID HERE ');  // Call the .show function with the session id

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Note

For scenarios where the modal is opened automatically, we recommend initializing it directly to avoid potential timing issues.

Destroy the Overlay

Closing the modal is generally done by client interaction, which fires a Reepay.Event.Close event. However, you also have the option of programmatically closing the modal by calling the .destroy function:

Overlay Destroy

var rp = new Reepay.ModalCheckout(' YOUR SESSION ID HERE ');

rp.destroy();

This function call will also fire the Reepay.Event.Close event.

Hide the receipt page

The overlay mode supports replacing the receipt page displayed at the end of a successful payment with a blank page. As seen below, to make use of this feature, add showReceipt: false to the options object.

var rp = new Reepay.ModalCheckout(' YOUR SESSION ID HERE ', {showReceipt: false});

When preloading, simply pass the options object when calling the show method.

rp.show(' YOUR SESSION ID HERE ', {showReceipt: false});

Error Handling

The Billwerk+ Payments Checkout SDK throws a number of possible errors, described below. All the errors extend the global Error object.