account for getFeedback() possibly returning undefined

Author: ryan953

docs/platforms/javascript/common/user-feedback/configuration/index.mdx

@@ -264,7 +264,7 @@ Sentry.init({
 // Get the instance returned by `feedbackIntegration()`
 const feedback = Sentry.getFeedback();
 
-feedback.attachTo(document.querySelector("#your-button"), {
+feedback?.attachTo(document.querySelector("#your-button"), {
   formTitle: "Report a Bug!",
 });
 ```
@@ -320,7 +320,7 @@ Sentry.init({
 // Get the instance returned by `feedbackIntegration()`
 const feedback = Sentry.getFeedback();
 
-const form = await feedback.createForm();
+const form = await feedback?.createForm();
 form.appendToDom();
 form.open();
 ```

platform-includes/user-feedback/manual-injection/javascript.mdx

@@ -11,7 +11,7 @@ Sentry.init({
 const feedback = Sentry.getFeedback();
 
 // Create and render the button
-const widget = feedback.createWidget();
+const widget = feedback?.createWidget();
 
 // Later, when it's time to clean up:
 widget.removeFromDom();

platform-includes/user-feedback/manual-injection/javascript.nextjs.mdx

@@ -23,7 +23,7 @@ function ToggleFeedbackButton() {
           widget.removeFromDom();
           setWidget(null);
         } else {
-          setWidget(feedback.createWidget());
+          setWidget(feedback?.createWidget());
         }
       }}
     >

platform-includes/user-feedback/manual-injection/javascript.react.mdx

@@ -23,7 +23,7 @@ function ToggleFeedbackButton() {
           widget.removeFromDom();
           setWidget(null);
         } else {
-          setWidget(feedback.createWidget());
+          setWidget(feedback?.createWidget());
         }
       }}
     >

platform-includes/user-feedback/manual-injection/javascript.remix.mdx

@@ -23,7 +23,7 @@ function ToggleFeedbackButton() {
           widget.removeFromDom();
           setWidget(null);
         } else {
-          setWidget(feedback.createWidget());
+          setWidget(feedback?.createWidget());
         }
       }}
     >