isBranchOpen

проверяет, открыта или закрыта указанная ветка

boolean isBranchOpen(idid);
ididid элемента
booleantrue, если ветка открыта, в противном случае - false

Example

tree = webix.ui({
    view: "tree",
    data: [
        { id: "branch1", value: "The Shawshank Redemption", data: [
            { id: "1.1", value: "Part 1" },
            { id: "1.2", value: "Part 2" }
        ]},
        { id: "branch2", value: "The Godfather", data: [
            { id: "2.1", value: "Part 1" }
        ]}
    ]
}); 
 
tree.isBranchOpen("branch1");

See also
Наверх
If you have not checked yet, be sure to visit site of our main product Webix lightweight js framework and page of TreeMap product.