JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app ng-controller="MyCtrl">
{{items}} <button ng-click="items.splice(1, 1)">Splice</button>
</div>

JavaScript

function MyCtrl($scope) {
    $scope.items = [1, 2, 3, 4, 5]
    
    $scope.$watch('items', function(){alert('111');}, true)
}