WebSQL replacement for local DB

Okay, so is there a tutorial anywhere for this? Or can you let me know where I can find a suitable plugin so I can read up on how to use it?
At the moment my code just uses the standard WEBSql instructions (e.g INSERT, SELECT, UPDATE, etc) so when I’m testing the app in a browser (e.g. Chrome) before packaging it as an app how do I test it locally in a browser if I need a plugin?
I’m not looking for my code to be written for me - I just need to be pointed in the right direction or have a few pointers about how I can test in a broswer when a plugin is needed.
Thanks.