FAQ-001149 - Lightning Web Components and JavaScript Security / Visualforce Security Considerations

Yes, JavaScript code issues in Visualforce pages are considered security vulnerabilities that must be addressed. Here's how to handle them securely: **Security Requirements:** - Dynamically loading JavaScript from third-party endpoints is not allowed due to security risks - JavaScript files should be stored in static resources and loaded securely - Any JavaScript-based API callouts or dynamic content must comply with security review guidelines **Secure Handling of Dynamic JavaScript Libraries:** To securely handle dynamic JavaScript libraries provided by third-party APIs in Visualforce pages: - Store the JavaScript files in the static resources folder of your package - Avoid dynamically loading JavaScript files from third-party endpoints or content delivery networks (CDNs) - Reference the JavaScript files using a `$Resource` URL in your Visualforce page This approach ensures the code is version-controlled and complies with Salesforce security review requirements. **Inline JavaScript Restrictions:** - JavaScript code should not be directly included in Visualforce pages. It must be stored in static resources and referenced from there - Inline JavaScript is not allowed in Visualforce pages and components if it is loaded from external web servers or third-party sources - It is not acceptable to use inline JavaScript in a `<script>` tag on a Visualforce page if the JavaScript is loaded from an external domain - JavaScript must be stored in static resources and referenced using a `$Resource` URL to ensure security compliance, version control, and adherence to security review standards These practices ensure compliance with security guidelines and prevent vulnerabilities associated with dynamic script loading.