JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-controller="Ctrl" ng-show="isNumber(num)">
    AAA
</div>

JavaScript

function Ctrl($scope){
    $scope.num = 'wadaw';
    
    $scope.isNumber= function (n) {
      return !isNaN(parseFloat(n)) && isFinite(n);
    }
}