JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script>

<div ng-app="app">
  <div ng-controller="MainCtrl">
    <form ng-submit="submit()">
      <input type="number" ng-model="form.testNumber" ng-change="changed()"/>
      <button type="submit">Submit</button>
    </form>
  </div>
</div>

JavaScript

var app = angular.module("app", []);

app.controller("MainCtrl", function ($scope) {
    $scope.form = {
      testNumber: ""
    };

    $scope.changed = function () {
        console.log("changed");
    };

    $scope.submit = function () {
        console.log("submitted");
    };
});