Should I use cookie or localStorage?

Question

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 cookies faster than local storage?

You know that browser storage has a greater storage capacity than cookies. Hence, browser storage is always a better choice than cookies to store large client-side data.

Why you shouldn't use local storage?

If an attacker can run JavaScript on your website, they can retrieve all the data you've stored in local storage and send it off to their own domain. This means anything sensitive you've got in local storage (like a user's session data) can be compromised.

Can localStorage replace cookies?

Local Storage (you'll find it under Web Storage on W3) is and isn't a replacement for cookies. That's what's most confusing about it. In most cases, you can safely use localStorage instead of cookies and get the (wrong) impression that they are the same, while they are not.

A local storage is a file created by a website in your device. Cookies are just one type of local storage, but there are others. It is important that you know them so you can block them or delete the data stored by them: Browser local storage.

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