How to hide and show different layer by clicking

[pinkfrog9]

Take the following picture as an example (note it is not produced by altair).

The picture contains different lines for SMA(c,10), SMA(C,20) etc. When I click the name SMA(C,10), it will toggle the showing of the corresponding line.

How to achieve that with altair?

[jonmmease]

Hi @pinkfrog9, is this interactive legend example helpful? https://altair-viz.github.io/gallery/interactive_legend.html

[pinkfrog9]

That really helps. Except the only difference is, what I want is just to toggle the clicked line alone. I can figure it out on my own.