JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="ShowModule">
    <div ng-controller="ShowContoller">
        <div ng-show="flag" class="myStyle">
            welcome to the India
        </div>
        <button ng-click="show()">Show</button>
        <button ng-click="hide()">Hide</button>
    </div>
</div>

CSS

.myStyle {
    color : red;
}

JavaScript

var app = angular.module("ShowModule",[]);

app.controller("ShowContoller", function($scope){
    $scope.flag = false;
    $scope.show = function() {
        $scope.flag = true;    
    }
    $scope.hide = function() {
        $scope.flag = false;    
    }
    
});