first commit

wp-content/plugins/woo-payu-payment-gateway/assets/js/sf-init.js

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+function sf_init() {
+    var cc = document.getElementById('payu-card-container');
+    if (cc) {
+        var lang = cc.dataset.lang;
+        var optionsForms = {
+            cardIcon: true,
+            style: {
+                basic: {
+                    fontSize: '18px'
+                }
+            },
+            placeholder: {
+                number: '',
+                date: 'MM/YY',
+                cvv: ''
+            },
+            lang: lang
+        };
+        var pcn = document.getElementById('payu-card-number');
+        if (pcn.childNodes.length === 0) {
+            var payuSdkForms = PayU(cc.dataset.payuPosid);
+            var secureForms = payuSdkForms.secureForms();
+            var cardNumber = secureForms.add('number', optionsForms);
+            var cardDate = secureForms.add('date', optionsForms);
+            var cardCvv = secureForms.add('cvv', optionsForms);
+
+            cardNumber.render('#payu-card-number');
+            cardDate.render('#payu-card-date');
+            cardCvv.render('#payu-card-cvv');
+            window.payuSdkForms = payuSdkForms;
+        }
+    }
+}