JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="changeApp" ng-controller="SomeCtrl">
    <input type="text" ng-model="input"></input>
</div>

JavaScript

var app = angular.module('changeApp', [])

.controller('SomeCtrl', function ($scope) {
    $scope.$watch('input', function (now, then, scope) {
        now = now || '';
        then = then || '';
        if (now.length > then.length && (now.length - then.length) > 1) {
            console.log('PASTED OR AUTOFILL');
        } else {
            console.log('NORMAL TYPING');
        }
    });
})