indexeddb

I am having a lot of problems when trying to run in production a program developed in HTML 5, Javascript, Ajax, JSON, Indexed ... ow simple is it at the moment if you use WebSQL that works perfectly and tomorrow or later WebSQL will even be discontinued ?

I am used to using Local Storage to save JWT, I would like to know the difference between Local Storage, IndexedDB and WebSQL and when to use one or the other.