Salesforce JavaScript Developer Practice Exam

Creating a custom modal in Lightning Web Components (LWC) involves creating a new LWC component that encapsulates all the necessary HTML, CSS, and JavaScript logic to manage the modal’s functionality. The modal’s visibility can be controlled through a boolean property, which allows you to open and close the modal dynamically based on user interactions.

When you set up a boolean property in the component’s JavaScript file, you can use it to conditionally render the modal in the HTML template. By toggling this property, the modal can be displayed or hidden as required, responding to user actions like button clicks. This approach provides flexibility and is a standard practice for building custom modals in LWC, as it allows for full control over the content and functionality of the modal.

While there are other methods for modals mentioned, they may not offer the same level of customization or control. Using the Lightning Design System modal component directly simplifies the process but does not allow for unique adaptations or additional features specific to your application's needs. Extending existing functionality through inheritance could complicate the design and reduce modularity, and modifying the main app component might lead to mixing concerns, reducing reusability and maintainability. Therefore, creating a dedicated LWC component with a boolean