This event is fired up when the validity of the input is changed. Open up the browser console to see that and as well the js tab.
It will work only with feedbackMode='submit'.
<div> <ch5-textinput type="number" minValue="5" maxValue="10" feedbackMode="submit"> </ch5-textinput> </div>
document.querySelector('input').addEventListener('validitychange', function() { console.log('Validity has been changed'); });
