JavaScript

Differences between localStorage and sessionStorage

April 28, 2022

Differences between localStorage and sessionStorage

In this article you will understand all the differences between localStorage and sessionStorage – you will also learn application cases for both approaches.

Differences between localStorage and sessionStorage thumb

Hey you programmer, ok? Let’s learn more about these ways to save data with JavaScript, in the browser itself.

Both approaches, localStorage and sessionStorage, extend from the Storage object

Which aims to save data in the browser’s memory

However, the issue of persistence is the big difference between storages

When using sessionStorage, the data will only be available for the window in which it was created

Also, as soon as the window is closed they will be immediately deleted and are no longer available.

In localStorage we have a different behavior, the data will be available indefinitely

Even closing the browser or restarting the computer, the same data can still be used for the user who created them.

So you should use localStorage when planning to reuse this data later

Remembering that the user can clean the Storage whenever he wants, so make validations to check if the data is present, before using it

And sessionStorage should be used when there is no intention to use the data later

Both formats have the ability to save up to 5mb of data which is much larger than storing cookies for example which is 4kb

Conclusion

In this article we learned the differences between localStorage and sessionStorage

With localStorage we can count on the data saved in an indefinite period

Using the sessionStorage approach, data is lost when closing the tab where it was saved, for example

Do you want to learn more about JavaScript? Click here!

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