Specify callback function to be called before collapse node, The return value controls the collapse node.
Default: null
zTree unique identifier: treeId.
JSON data object of the node to be collapsed
return true or false
If return false, zTree will not collapse node, and will not trigger the 'onCollapse' callback.
function myBeforeCollapse(treeId, treeNode) {
return false;
};
var setting = {
callback: {
beforeCollapse: myBeforeCollapse
}
};
......