Setting cookies in JavaScript enables persistent data storage across browser sessions, perfect for user preferences, authentication tokens, and tracking information. As the creator of CoreUI with over 25 years of JavaScript experience, I’ve used cookies extensively in production applications for session management and user experience personalization. The most straightforward approach uses document.cookie with proper formatting for cookie name, value, expiration, and security options. This method provides reliable cross-session data storage while maintaining compatibility across all browsers.

Using sessionStorage for state persistence is ideal when you need temporary data storage that clears when the browser tab closes. As the creator of CoreUI with extensive React development experience since 2014, I’ve used sessionStorage for form data, wizard steps, and temporary user preferences. The implementation is nearly identical to localStorage but provides session-scoped persistence instead of permanent storage. This approach is perfect for sensitive data or temporary application state that shouldn’t persist indefinitely.

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.