Detecta cada vez que se introduce texto en un input, sea cual sea el medio (copy and paste, drag and drop, etc.)

input-final-onchange.js

$(':input').on('propertychange input', function (e) {
    var valueChanged = false;

    if (e.type=='propertychange') {
        valueChanged = e.originalEvent.propertyName=='value';
    } else {
        valueChanged = true;
    }
    if (valueChanged) {
        /* Code goes here */
    }
});