Marker option riseOnHover doesn't work

[StefanBrand]

I tried to implement that markers rise, when you hover over them, but I couldn't make it work.

Here is the relevant Leaflet-documentation: http://leafletjs.com/reference.html#marker-riseonhover

[Roboe]

Marker options is a single object

{
  option1: value,
  option2: value,
  ...
}