Coarse classification of what a hook observes, used to bucket every hook
kind into the uniform registry. 'edge' hooks watch a from→to
transition (optionally narrowed to a named action); 'state' hooks watch
a single state (entry/exit/after, or a state boundary hook); 'action'
hooks watch a named action regardless of edge; 'global' hooks watch every
transition or every action (the any-*, transition-class, and everything
observers); 'group' hooks watch a named state group's enter/exit boundary.
Coarse classification of what a hook observes, used to bucket every hook kind into the uniform registry.
'edge'hooks watch afrom→totransition (optionally narrowed to a namedaction);'state'hooks watch a single state (entry/exit/after, or a state boundary hook);'action'hooks watch a named action regardless of edge;'global'hooks watch every transition or every action (theany-*, transition-class, andeverythingobservers);'group'hooks watch a named state group's enter/exit boundary.