wrap

'wraps' a function around the original function

target	function	the function to wrap. It receives the new logic
source	function	a function that contains the logic to wrap

function

the target object 'wrapped' around by the new logic

Example

list.add = webix.wrap(list.add, function(obj, index){
    //log all data adding operations
    console.log("add "+obj.id);
});

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