JSFiddle - React, Tailwind, and code Playground

by Michele Marcucci

HTML

<div ng-app="myApp" ng-controller="myCtrl">
    <input type="button" value="-" name="minus" id="minus" ng-click="click($event)" />
    <input type="text" ng-model="numValBox" class="numValBox"></div>
</div>

JavaScript

angular.module('myApp', [])
.controller('myCtrl', function ($scope) {
    $scope.numValBox = "hello world";
    $scope.click = function (event) {
        $scope.numValBox = ($scope.numValBox.match(/-/)) ? $scope.numValBox.replace('-', '') : '-'+$scope.numValBox; 
    };
});