refactor config checks

Author: kbond

src/LiveComponent/src/EventListener/AddLiveAttributesSubscriber.php

@@ -20,7 +20,7 @@ public function __construct(private ContainerInterface $container)
 
     public function onPreRender(PreRenderEvent $event): void
     {
-        if (!isset($event->config['live'])) {
+        if (!($event->config['live'] ?? false)) {
             // not a live component, skip
             return;
         }

src/LiveComponent/src/EventListener/LiveComponentSubscriber.php

@@ -78,7 +78,7 @@ public function onKernelRequest(RequestEvent $event): void
             throw new NotFoundHttpException(sprintf('Component "%s" not found.', $componentName), $e);
         }
 
-        if (!isset($config['live'])) {
+        if (!($config['live'] ?? false)) {
             throw new NotFoundHttpException(sprintf('"%s" is not a Live Component.', $config['class']));
         }
 

src/LiveComponent/src/Twig/LiveComponentRuntime.php

@@ -53,7 +53,7 @@ public function getComponentUrl(object $component, string $name = null): string
 
     public function getLiveAttributes(object $component, array $config): ComponentAttributes
     {
-        if (!isset($config['live'])) {
+        if (!($config['live'] ?? false)) {
             throw new \LogicException(sprintf('"%s" is not a Live Component.', $config['class']));
         }