Setting items in sessionStorage enables temporary data storage that persists throughout the browser session but clears when the tab closes. As the creator of CoreUI with extensive JavaScript experience since 2000, I’ve used sessionStorage extensively for form data, temporary state, and session-specific configurations. From my expertise, the most reliable approach is using the sessionStorage.setItem() method which stores data as key-value pairs for the current session. This storage method is perfect for temporary data that shouldn’t persist across browser sessions.