javascript – In VSCode, how do we get preview of an elements over tooltip?

I’m new into programming world and currently following some tutorials over the Internet.
Long story short, here’s the problem I’d encountered.

1. When I hover over my code, a minimalized tooltip is shown as below.

2. In the tutorial, when the lecturer hover over the same code, it shows the actual value instead.

Is there any ways to customize the tooltip shown to me every time when I hover over something? I’ve tried holding down ALT key but it doesn’t work.

I was coding along with the tutorial, so there shouldn’t be any difference between my code and the tutorial’s code. I just found it useful if I can see the values every time when I hover over them.