What is the name of the beautiful spoiler opening plugin?

Question

css

Comrades, help me, I saw a beautiful spoiler some time ago (part of the text hidden under the button), but at the moment I couldn’t find it right away.
It works like this:
The first part of the text is visible. Below it with a gradient to transparency is part of the next. Clicking on the gradient bar opens the text below the gradient with the rest of the text.

It doesn't have to be a library or a ready-made example. You can just link to the site where it is implemented.
Thanks in advance.

Answer 1

As usual...
If you want to do something well, do it yourself. © Ferdinand Porsche
Here's an example I found at jsfiddle.net/qdophzto/2 (already slightly edited here).
Maybe someone will come in handy.
PS: Transparency is added to the bottom of the box with one property: box-shadow: inset 0 -60px 60px -60px #ddd;
You can implement it differently, but there is no need for it at all =)

Answer 2

Learn jQuery and be happy.
There are plenty of examples both on the site and in the internet.
Google -> "spoiler jQuery"