Ejemplo
Vista Previa
<!doctype html> <html> <head> <title>Prueba de Bootstrap 5</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-wEmeIV1mKuiNpC+IOBjI7aAzPcEZeedi5yW5f2yOq55WWLwNGmvvx4Um1vskeMj0" crossorigin="anonymous"> </head> <body> <div class="container"> <form> <label for="control1">Seleccione un elemento</label> <select class="form-select mb-3" id="control1" name="control1"> <option>1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> </select> <label for="control2">Seleccione varios elementos</label> <select multiple class="form-select mb-3" id="control2" name="control2"> <option>1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> </select> <button type="submit" class="btn btn-primary">Enviar</button> </form> </div> </body> </html>
No tiene disponible el navegador la capacidad de iframe