Contents
- 1 Why would you use a cookie instead of local storage?
- 2 What is the difference between local storage session storage and cookies?
- 3 How do I use local storage instead of cookies?
- 4 What’s the difference between cookies and local storage?
- 5 Can you use localStorage to track a user?
- 6 When does the localStorage expire in JavaScript?
Cookies and local storage serve different purposes. Cookies are mainly for reading server-side, whereas local storage can only be read by the client-side . Apart from saving data, a big technical difference is the size of data you can store, and as I mentioned earlier localStorage gives you more to work with.
Are you always confused between session storage, local storage and cookies? The sessionStorage object stores data only for a session, meaning that the data is stored until the browser (or tab) is closed. Data is never transferred to the server. Storage limit is larger than a cookie (at least 5MB).
How much data we can store in cookie?
To comply with the standard, you should store no more than 4096 bytes per cookie.
localStorage will be available for any tab or window in the browser, and will exist until it is deleted by the user or the program. Unlike a cookie, you cannot setup expiration. localStorage has a much larger storage limit as well.
Local Storage, along with Session Storage, aims to be a replacement of the cookies, defining a more consistent API. There are a few differences from the cookies: While the cookies are accessible from both client and server side, Web Storage, in general, and Local Storage, in particular, are accessible only from client side.
Do you need cookie consent when using localStorage?
No need for cookie consent when using localstorage: A site only needs to ask for cookie consent for cookies that are not “strictly necessary cookies” (learn more about it here ). Session cookies count as strictly necessary and hence a user cannot deny their usage.
Can you use localStorage to track a user?
If parts of your site are on different subdomains, or if some pages use http and others pages use https, you cannot use localStorage to track users between those pages. For this reason, cookies continues to be the officially recommended way to store the Client ID.
When does the localStorage expire in JavaScript?
User agents should expire data from the local storage areas only for security reasons or when requested to do so by the user. The above looks like it works just like cookies on the clientside. I.e. when the user clears all browser data (history, cookies, cache etc) the localStorage will also be truncated.