The valuechange-event is a sophisticated event. It will be emitted on every type of intermediate changes of the element. Even when you paste content by rightclicking the mouse.
Enter some text or paste it: see that an valuechange-event occurs:
Code-example:
<body>
<div id="input-container">
<input id="example" />
</div>
<div id="container"></div>
</body>
<script src="itsabuild-min.js"></script>
<script>
var container = document.getElement('#container');
var showMsg = function(e) {
container.setText(e.value);
};
ITSA.Event.after('valuechange', showMsg, '#example');
</script>