Ejemplo
Vista Previa
<!doctype html> <html> <head> <title>Prueba de Bootstrap 4</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous"> </head> <body> <div class="container"> <div class="row" style="height: 300px; background-color:#dd0"> <div class="col align-self-start" style="background-color:#aaa"> <h1>Columna 1</h1> </div> <div class="col align-self-center" style="background-color:#bbb"> <h1>Columna 2</h1> </div> <div class="col align-self-end" style="background-color:#ccc"> <h1>Columna 3</h1> </div> </div> </div> </body> </html>
No tiene disponible el navegador la capacidad de iframe