<form> <div class="form-group"> <label for="exampleInputEmail1">Email address</label> <input type="email" class="form-control"> <small id="emailHelp" class="form-text text-muted">Hello, World</small> </div> </form>
<select class="custom-select"> <option selected>Open this select menu</option> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select>