Which technology enables web applications to store data locally within the browser?

Which technology enables web applications to store data locally within the browser?

• A. Web Storage
• B. Cookies
• C. Cache
• D. Server Sessions

Answer: (A)

Storing data locally in the browser is handled by Web Storage, which provides localStorage and sessionStorage for saving key-value pairs directly on the user's device. Local storage keeps data across browser sessions, while session storage lasts only for the current tab or window session. You interact with it using code like localStorage.setItem('theme','dark') and localStorage.getItem('theme'), and you can store objects by converting them to JSON strings. This data isn’t sent with every server request, unlike cookies, and it isn’t part of the browser’s general resource cache or tied to server-side sessions. Web Storage is precisely the mechanism web apps use to keep data locally in the browser.

Storing data locally in the browser is handled by Web Storage, which provides localStorage and sessionStorage for saving key-value pairs directly on the user's device. Local storage keeps data across browser sessions, while session storage lasts only for the current tab or window session. You interact with it using code like localStorage.setItem('theme','dark') and localStorage.getItem('theme'), and you can store objects by converting them to JSON strings. This data isn’t sent with every server request, unlike cookies, and it isn’t part of the browser’s general resource cache or tied to server-side sessions. Web Storage is precisely the mechanism web apps use to keep data locally in the browser.