Disable via CSS class

modules/ppcp-button/resources/css/gateway.scss

@@ -1,3 +1,9 @@
 #place_order.ppcp-hidden {
 	display: none !important;
 }
+
+.ppcp-disabled {
+	cursor: not-allowed;
+	-webkit-filter: grayscale(100%);
+	filter: grayscale(100%);
+}

modules/ppcp-button/resources/js/modules/Helper/ButtonDisabler.js

@@ -17,20 +17,14 @@ export const setEnabled = (selectorOrElement, enable, form = null) => {
     }
 
     if (enable) {
-        jQuery(element).css({
+        jQuery(element)
-                'cursor': '',
+            .removeClass('ppcp-disabled')
-                '-webkit-filter': '',
-                'filter': '',
-            } )
             .off('mouseup')
             .find('> *')
             .css('pointer-events', '');
     } else {
-        jQuery(element).css({
+        jQuery(element)
-                'cursor': 'not-allowed',
+            .addClass('ppcp-disabled')
-                '-webkit-filter': 'grayscale(100%)',
-                'filter': 'grayscale(100%)',
-            })
             .on('mouseup', function(event) {
                 event.stopImmediatePropagation();
 

modules/ppcp-button/src/Assets/SmartButton.php

@@ -591,14 +591,12 @@ class SmartButton implements SmartButtonInterface {
 			);
 		}
 
-		if ( in_array( $this->context(), array( 'pay-now', 'checkout' ), true ) ) {
 		wp_enqueue_style(
 			'gateway',
 			untrailingslashit( $this->module_url ) . '/assets/css/gateway.css',
 			array(),
 			$this->version
 		);
-		}
 
 		wp_enqueue_script(
 			'ppcp-smart-button',