Handle previous/submit buttons on drupal webform

docs/index.md

@@ -8,13 +8,15 @@ Latest releases can be found here: https://civicrm.org/extensions/stripe-payment
 View this extension in the [Extension Directory](https://civicrm.org/extensions/stripe-payment-processor).
 
 ## Compatibility / Requirements
-* CiviCRM 5.10+
-* PHP 7.0+
+* CiviCRM 5.13+
+* PHP 7.1+
 * Jquery 1.10 (Use jquery_update module on Drupal).
 * Drupal 7 / Joomla / Wordpress (latest supported release). *Not currently tested with other CMS but it may work.*
-* Stripe API version: 2019-02-19
+* Stripe API version: 2019-08-14
 * Drupal webform_civicrm 7.x-4.22+ (if using webform integration)
 
+If using test mode with drupal webform_civicrm you need this patch: https://github.com/colemanw/webform_civicrm/pull/266
+
 ## Credits
 Current Maintainer: Matthew Wire - https://www.mjwconsult.co.uk
 

js/civicrm_stripe.js

@@ -249,17 +249,14 @@ CRM.$(function($) {
     // For CiviCRM Webforms.
     if (getIsDrupalWebform()) {
       // We need the action field for back/submit to work and redirect properly after submission
-      if (!($('#action').length)) {
-        form.append($('<input type="hidden" name="op" id="action" />'));
-      }
-      var $actions = form.querySelector('[type=submit]');
+
       $('[type=submit]').click(function() {
-        $('#action').val(this.value);
+        addDrupalWebformActionElement(this.value);
       });
       // If enter pressed, use our submit function
       form.addEventListener('keydown', function (e) {
         if (e.keyCode === 13) {
-          $('#action').val(this.value);
+          addDrupalWebformActionElement(this.value);
           submit(event);
         }
       });
@@ -453,4 +450,19 @@ CRM.$(function($) {
     }
   }
 
+  function addDrupalWebformActionElement(submitAction) {
+    var hiddenInput = null;
+    if (document.getElementById('action') !== null) {
+      hiddenInput = document.getElementById('action');
+    }
+    else {
+      hiddenInput = document.createElement('input');
+    }
+    hiddenInput.setAttribute('type', 'hidden');
+    hiddenInput.setAttribute('name', 'op');
+    hiddenInput.setAttribute('id', 'action');
+    hiddenInput.setAttribute('value', submitAction);
+    form.appendChild(hiddenInput);
+  }
+
 });