Does sessionStorage store data for just one tab or for the entire domain?

Question

Browsers

When you close the tab, the data in sessionStorage is cleared by itself. In the case when several tabs with the same domain were opened, then on the contrary, will nothing be deleted (until the last tab of the same domain is closed), or sessionStorage for each tab is different?

Answer 1

SessionStorage for each tab is different. The availability of data in sessionStorage is limited by the window. If you open two tabs with the same document, then these two tabs will own different sessionStorage.
For long-term storage of data between tabs, use localStorage.