Themes

The embedded form includes 2 ready-to-use themes. Each theme requires for corresponding CSS and JS files to be loaded.

The CSS theme file allows to apply a basic theme while waiting for the payment form to finish loading. This is particularly important on devices with slow connection. It must always be placed in the header of the page.

The JS theme file contains the active part of the theme (animations, styles, elements, etc.). It must be loaded before the main JavaScript library.

Each of these themes can be used in embedded form mode or in pop-in mode.

Classic theme

Classic is the default theme. The associated files are:

files	Description
classic-reset.min.css	Applies the classic theme by forcing the styles (!important).
classic.css	Applies the classic theme while taking into account the styles of the page.
classic.js	Active part of the classic theme.

Example of classic theme:

Example of code for displaying the classic theme:

/doc/en-EN/rest/V4.0/api/kb/authentication.html

https://github.com/lyra/rest-php-examples/blob/master/www/minimalEmbeddedForm.php#L45-L85

https://api.systempay.fr/api-payment/V4/Charge/CreatePayment

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" 
   content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />  

  <!-- Javascript library. Should be loaded in head section -->
  <script 
   src="https://static.systempay.fr/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js" 
   kr-public-key="73239078:testpublickey_Zr3fXIKKx0mLY9YNBQEan42ano2QsdrLuyb2W54QWmUJQ" 
   kr-post-url-success="paid.html">
  </script>

  <!-- theme and plugins. should be loaded after the javascript library -->
  <!-- not mandatory but helps to have a nice payment form out of the box -->
  <link rel="stylesheet" 
  href="https://static.systempay.fr/static/js/krypton-client/V4.0/ext/classic-reset.css">
 <script 
  src="https://static.systempay.fr/static/js/krypton-client/V4.0/ext/classic.js">
 </script> 
</head>
<body>
  <!-- payment form -->
  <div class="kr-embedded"  kr-form-token="DEMO-TOKEN-TO-BE-REPLACED">

    <!-- payment form fields -->
    <div class="kr-pan"></div>
    <div class="kr-expiry"></div>
    <div class="kr-security-code"></div>

    <!-- payment form submit button -->
    <button class="kr-payment-button"></button>

    <!-- error zone -->
    <div class="kr-form-error"></div>
  </div>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" 
   content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 

  <!-- Javascript library. Should be loaded in head section -->
  <script 
   src="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
   kr-public-key="<?php echo $client->getPublicKey();?>"
   kr-post-url-success="paid.php">
  </script>

  <!-- theme and plugins. should be loaded after the javascript library -->
  <!-- not mandatory but helps to have a nice payment form out of the box -->
  <link rel="stylesheet" 
   href="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/ext/classic-reset.css">
  <script 
   src="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/ext/classic.js">
  </script>
</head>
<body style="padding-top:20px">
  <!-- payment form -->
  <div class="kr-embedded" kr-form-token="<?php echo $formToken;?>">

    <!-- payment form fields -->
    <div class="kr-pan"></div>
    <div class="kr-expiry"></div>
    <div class="kr-security-code"></div>  

    <!-- payment form submit button -->
    <button class="kr-payment-button"></button>

    <!-- error zone -->
    <div class="kr-form-error"></div>
  </div>  
</body>
</html>

Classic theme (pop-in)

You can also display the classic theme in a pop-in by adding the kr-popin attribute:

/doc/en-EN/rest/V4.0/api/kb/authentication.html

https://github.com/lyra/rest-php-examples/blob/master/www/minimalEmbeddedForm.popIn.php#L70-L72

https://api.systempay.fr/api-payment/V4/Charge/CreatePayment

  <div class="kr-embedded" kr-popin kr-form-token="<?php echo $formToken;?>">

The result will be:

It is possible to personalize the image and the name of the shop appearing in the pop-in. For more information, go to: JavaScript client reference.

Material Design theme

Material Theme applies the guidelines defined by Google. The associated files are:

files	Description
material-reset.css	Applies Material Theme by forcing styles (!important).
material.css	Applies Material Theme while respecting the styles of the page.
material.js	Active part of the classic theme.

Example of Material Theme:

Example of code for displaying Material Theme:

/doc/en-EN/rest/V4.0/api/kb/authentication.html

https://github.com/lyra/rest-php-examples/blob/master/www/minimalEmbeddedForm.mat.php#L45-L85

https://api.systempay.fr/api-payment/V4/Charge/CreatePayment

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" 
   content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 

  <!-- Javascript library. Should be loaded in head section -->
  <script 
   src="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
   kr-public-key="<?php echo $client->getPublicKey();?>"
   kr-post-url-success="paid.php">
  </script>

  <!-- theme and plugins. should be loaded after the javascript library -->
  <!-- not mandatory but helps to have a nice payment form out of the box -->
  <link rel="stylesheet" 
   href="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/ext/material-reset.css">
  <script 
   src="<?php echo $client->getClientEndpoint();?>/static/js/krypton-client/V4.0/ext/material.js">
  </script>
</head>
<body style="padding-top:20px">
  <!-- payment form -->
  <div class="kr-embedded" kr-form-token="<?php echo $formToken;?>">

    <!-- payment form fields -->
    <div class="kr-pan"></div>
    <div class="kr-expiry"></div>
    <div class="kr-security-code"></div>  

    <!-- payment form submit button -->
    <button class="kr-payment-button"></button>

    <!-- error zone -->
    <div class="kr-form-error"></div>
  </div>  
</body>
</html>

Material Theme (pop-in)

You can also display Material Theme in a pop-in by adding the kr-popin attribute:

/doc/en-EN/rest/V4.0/api/kb/authentication.html

https://github.com/lyra/rest-php-examples/blob/master/www/minimalEmbeddedForm.popIn.php#L70-L72

https://api.systempay.fr/api-payment/V4/Charge/CreatePayment

  <div class="kr-embedded" kr-popin kr-form-token="<?php echo $formToken;?>">

Form without a theme

If you want to create a custom theme, it is recommended to include the no-theme-css CSS. It ensures minimum compatibility with all browsers (desktop and mobile) on the market :

files	Description
no-theme.min.css	Applies minimal CSS to guarantee that the form works properly.

Customizing a theme

The embedded form (as well as the pop-in) applies the styles in 2 steps:

by loading a CSS file (e.g. classic-reset.min.css) in the header of the page.
Afterwards, the theme is refined thanks to a configuration object (included in classic.js).

The initial CSS file

This file allows to reserve the space and apply a minimal style to the form before JavaScript is loaded and executed.

We recommend always loading this CSS file in the page header. classic-reset.min.css , or no-theme.min.css are two examples of the initial CSS files provided.

The configuration object

JavaScript theme files (such as classic.js or material.js ) contain a configuration object that defines the whole theme: animations, styles, HTML elements.

The only difference between the classic, material, embedded or pop-in forms is in this configuration object.

The configuration object reference

PARAMETER	Type	Description
form.fields.order	string list	Default field order (if not included), such as ["pan", "securityCode", "expiry"].
form.controls.order	string list	Default controls order (if not included) such as ["formButton", "error"].
form.layout	string	Payment form layout: default or compact.
merchant.header.image.src	string	Image url or data:image (type supported by CSS).
merchant.header.image.type	string	Background (occupies the entire header) or logo (round centered logo).
merchant.header.image.visibility	boolean	True/false: if false, the image is hidden.
merchant.header.shopName.color	string	Color of shop name. Example: ‘red’ (CSS attribute).
merchant.header.shopName.gradient	boolean	True/false: applies (or not) a gradient in the header.
merchant.header.backgroundColor	string	Background color of the header. Example: ‘red’ (CSS attribute).

Examples of configuration of the pop-in header

The configuration object must be passed as follows:

let config = {
  "merchant": {
    "header": {
      "image": {
        "visibility": false
      }
    }
  }
};

KR.setFormConfig(config);

Here are some examples of configuration of the pop-in header.

Change the logo:

{
  "merchant": {
    "header": {
      "image": {
        "type": "logo",
        "visibility": true,
        "src": "<https://www.logomoose.com/wp-content/uploads/2018/02/logomoosedogandowl-011.jpg>"
      }
    }
  }
}

Pass an image in string format:

{
  "merchant": {
    "header": {
      "image": {
        "type": "background",
        "visibility": true,
        "src": "data:image/svg+xml;base64,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"
      }
    }
  }
}

Creating you own themes

The payment form fields are customizable via standard CSS directives. All you need to do is apply them and they will be automatically transferred, even for the elements contained in the iframes of sensitive fields.

Thanks to a system of hidden fields, the JavaScript client will automatically retrieve the styles of your page and include them in iframes.

Categories

Tags

Themes

Classic theme

Classic theme (pop-in)

Material Design theme

Material Theme (pop-in)

Form without a theme

Customizing a theme

The initial CSS file

The configuration object

The configuration object reference

Examples of configuration of the pop-in header

Creating you own themes