Local db without installation?

Question

JavaScript

Good day.
The question is. Is there any database that does not require installation?
The bottom line is that there is a PC and a browser on board. It is impossible to install anything and there is no Internet, but I would like to somehow work with databases. Using a text document as a base is also not a very good option.

Answer 1

Try indexedDB

Answer 2

sqlite

Answer 3

What do you mean it can't be installed? Is it possible to launch? You can run almost any local server without installation, just a portable version.
For example, for mysql there will be mysqld --defaults-file=c:\mysql\my.ini ... and let's go to work. Similar for other bases.