prevent select propogation

Trying to prevent event propagation from a select element inside a form that is inside a dropdown menu.

Bulk Edit One Two Three Four Five Column

                                        <!-- Password input -->
                                        <div class="form-outline mb-4">
                                            <input type="password" id="form1Example2" class="form-control" />
                                            <label class="form-label" for="form1Example2">Password</label>
                                        </div>

                                        <!-- 2 column grid layout for inline styling -->
                                        <div class="row mb-4">
                                            <div class="col d-flex justify-content-center">
                                                <!-- Checkbox -->
                                                <div class="form-check">
                                                    <input class="form-check-input" type="checkbox" value=""
                                                        id="form1Example3" checked />
                                                    <label class="form-check-label" for="form1Example3"> Remember me
                                                    </label>
                                                </div>
                                            </div>

                                            <div class="col">
                                                <!-- Simple link -->
                                                <a href="#!">Forgot password?</a>
                                            </div>
                                        </div>

                                        <!-- Submit button -->
                                        <button type="submit" class="btn btn-primary btn-block">Sign in</button>
                                    </form>
                                    <div class="dropdown-divider"></div>
                                    <a class="dropdown-item" href="#">New around here? Sign up</a>
                                    <a class="dropdown-item" href="#">Forgot password?</a>
                                </div>