IndexDB

https://stackoverflow.com/questions/46418859/when-should-i-use-web-sql-versus-indexeddb#:~:text=Web%20SQL%20is%20deprecated%20per,so%20it%20is%20more%20performant.

Web SQL is deprecated per https://www.w3.org/TR/webdatabase/. You can use IndexedDB if you need to store structured client specific data that you do not store in the server side or you do not want to request from the server every time. Also as opposed to localStorage , IndexedDB is async so it is more performant.26 Sept 2017