Front-end sequence

Front-end integration consists of 2 widgets to be implemented and invoked on the checkout page:

• senseJS for fingerprinting
• UIWidget for FlexCharge's response

Front-end snippets can be found in you Sandbox account. Developers > Sites > View/Edit

SenseJS

SenseJS is a JavaScript library for the browser that is used as a device fingerprint and to track simple page events like loading, pasting, resizing.

Embed SenseJS

The snippet to embed SenseJS can be found in your Sandbox account. Developers > Sites > View/Edit > SenseJS

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Content Security Policy

If you use CSP (Content Security Policy) headers on your site, you must allow the "*.flex-charge.com" in connect-src directive for full functionality based on your host configuration.

Text

Content-Security-Policy: connect-src 'self' https://*.flex-charge.com;

Invoke SenseJS

Sense JS needs to be invoked with your order id for all of your payment transactions, as soon as possible in the payment flow, before you receive the response for your payment transaction from the PSP.

This is how a customer session can be matched with their specific order.

<script>
    window.addEventListener('load', function() {
            window.fc.setOrderId({ orderId: 'your order id' });
        });
</script>

UI Widget

The UI Widget handles the response from Evaluate.

Embed UI Widget

The snippet to embed the UI Widget can be found in your Sandbox account. Developers > Sites > View/Edit > UI configuration

❗️

Content Security Policy

If you use CSP (Content Security Policy) headers on your site, you must allow the "*.flex-charge.com" in connect-src directive for full functionality based on your host configuration.

Text

Content-Security-Policy: connect-src 'self' https://*.flex-charge.com;

Invoke UI Widget

After the decline response from PSP, invoke initUI instead of redirecting to the decline page.

<script>
    window.addEventListener('load', function() {
            window.UIWidget.InitUi({
                successUrl: 'https://your-site-success-page',
                rejectUrl: 'https://your-site-decline-page',
                cancelUrl: 'https://your-site-cancel-page',
            });
        });
</script>

Configuration

Events listeners

The UI Widget allows adding events, to which you can register easily, by calling .on(eventName, callbackFunction) on your Widget instance.

UIWidget.on("success", () => {
  console.log("Do something");
});

Events can be removed.

UIWidget.removeEvent("success")

Widget initialization argument object fields

How to pass additional information to the UI Widget during initialization.

You can set additional fields for argument object when you trigger InitUi method. This information is essential for the UI Widget to function properly and to provide the user with a seamless payment experience.

UIWidget.InitUi({ 
  orderSessionKey: 'bd5b3f47-a15e-4b5e-b8f1-799edfdf33e7', 
  successUrl: 'https://your-site-success-page',
  rejectUrl: 'https://your-site-decline-page',
  cancelUrl: 'https://your-site-cancel-page',
});