JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app ng-controller="ParentCtrl">
        <div ng-controller="ChildCtrl as vm">
           {{$parent.cities}}
        </div>
    </div>

JavaScript

function ParentCtrl($scope) {
        $scope.cities = ["NY", "Amsterdam", "Barcelona"];
    }
    
    function ChildCtrl($scope) {
        $scope.parentcities = $scope.$parent.cities;
    }