Check documentation for the latest version 6.0 of dhtmlxSuite onCheck DHTMLX Docs

onCheck

fires immediately after an item in the tree has been checked/unchecked

void onCheck(string|number id,boolean state){ ... };

Parameters

idstring|numberid of the item that was checked/unchecked
statebooleancurrent state of the checkbox (1 - item is checked, 0 - item is unchecked)

Example

myTree.attachEvent("onCheck", function(id, state){
    // your code here
});

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