Define groups of nodes

You can affect a group to a node using the group column in the node data.frame, and then add a configuration per group using visGroups function. And so, you can transfer less data to javascript

nodes <- data.frame(id = 1:5, group = c(rep("A", 2), rep("B", 3)))
edges <- data.frame(from = c(2,5,3,3), to = c(1,2,4,2))

visNetwork(nodes, edges, width = "100%") %>% 
  # darkblue square with shadow for group "A"
  visGroups(groupname = "A", color = "darkblue", shape = "square", 
            shadow = list(enabled = TRUE)) %>% 
  # red triangle for group "B"
  visGroups(groupname = "B", color = "red", shape = "triangle")             

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