Parameters

cy has a key-value store referred to as parameters. In addition to being available for use from Janet for arbitrary purposes, parameters are also the primary means of configuring cy's behavior.

Parameters are set with param/set and retrieved with param/get:

(param/set :root :some-parameter true)

(param/get :some-parameter)
# returns true

Parameters work just like bindings do in the node tree in that the parameter values in descendant nodes overrite those in their ancestors. This allows cy's functionality to be configured on a per-group (or even per-pane) basis.

cy's settings are known as default parameters. They are set and retrieved in the same way normal parameters are, but influence cy's behavior in ways not directly controllable using the API. A complete list can be found in the default parameters chapter.