How to listen to the updated event :
// Field container var el = Y.one('#container1'); // Logs container var el2 = Y.one('#container2'); var field1 = new Y.inputEx.LinkedComboField({ name: 'car', label: 'Which car ?', choices: [ { value: "", choices: [""] }, { value: "BMW Z Series", choices: ["Z1", "Z3", "Z4", "Z8"] }, { value: "MINI", choices: ["One", "Cooper S", "Cooper D", "Clubman", "John Cooper Works"] } ], parentEl: el, required: true }); var button = inputEx.cn('button', null, null, "SetValue with 'MINI_One'"); el.appendChild(button); Y.one(button).on('click' ,function() { field1.setValue('MINI_One'); }); var logDiv = inputEx.cn('div', null, null, "Log :"); el2.appendChild(logDiv); logDiv.appendChild(inputEx.cn('br')); field1.on('updated', function(value) { logDiv.innerHTML += "Updated at "+(new Date())+" with value "+value; logDiv.appendChild(inputEx.cn('br')); });