How to set class=“active” in jQuery
File : HTML file <body> <div class="container"> <ul class="nav nav-tabs"> <li id="parentMenuId"><a href="#parentMenu">Parent Menu</a></li> <li id="childMenuId"><a href="#childMenu">Child Menu</a></li> </ul> <div id="parentMenu"> <center> <div class="form-group"> <h1>parent menu</h1> </div> </center> </div> <div id="childMenu"> <center> <h1>child menu</h1> </center> </div> </div> </body> File : Scripting file <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>...