Simple click on the active input the "Domsubtreemodified" event

Question

I’m using this code:

document.body.addEventListener('DOMSubtreeModified', function () {            
    document.title = 'Editar Material *';
    formChanged = true;
}, false);

To check for any changes in the various forms and possible images to edit. The problem I found was the following: just a click on a :input to trigger the event.

It is possible to skip the simple click on the :input without any change? I know there are more correct ways to check for changes in the forms, but I need to use something like this.