JSFiddle - React, Tailwind, and code Playground

by Valentin Sarychev

HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<div ng-app="app" ng-controller="AppCtrl">
    <button ng-click="addToArr1()">add</button>
    <div>{{arr3}}</div>
</div>

JavaScript

angular.module('app', []).controller('AppCtrl', function($scope) {
    $scope.arr1 = [1, 2];
    $scope.arr2 = [3, 4];
    $scope.addToArr1 = function() {
        $scope.arr1.push(5);
    };
    $scope.$watchCollection(function() {
        return [].concat($scope.arr1, $scope.arr2);
    }, function(arr3) {
        $scope.arr3 = arr3;
    });
});