Currently, I have a web map with multiple layers.
I would like the final user to be able to select one layer can be turned on at a time.
Currently, multiple layers can be turned on, but only the layer on top is visible.
If you made your map with CARTO Builder, you can toggle the layer selector in the Map Options. However, this won't act exactly like a radio button (more than one layer can be selected at the same time). Here's a GIF showing how:
Here's an example by Jorge Sanz making a custom layer selector with CARTO.js.
Note: I'm currently working at CARTO.