BootStrap dropdown menu hides behind the screen - css

Question

I'm using BootStrap v4.3 and I have problem with dropdown menu in navigation, it hides after right side of screen:
image of this dropdown
I speak straight away that adding negative margin-left won't work because it breaks on mobile devices then.
<nav class="navbar navbar-dark bg-primary navbar-expand-md">
<a class="navbar-brand" href="index.php" >
Nazwa
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-bar1" aria-controls="navbar-bar1" aria-expanded="false" aria-label="Przełączanie nawigacji" >
<i class="fas fa-bars"></i>
</button>
<div class="collapse navbar-collapse" id="navbar-bar1" >
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="index.php">Strona główna</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Strona 2</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Strona 3</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">Zaloguj się lub zarejestruj</a>
</li>
<li class="nav-item dropdown">
<a id="navbar-subbar1" class="nav-link dropdown-toggle" href="#" data-toggle="dropdown" role="button" aria-expanded="false" aria-label="Przełączanie menu konta" aria-haspopup="true" ><i class="fas fa-user"></i> Nacioszeczek</a>
<div class="dropdown-menu" aria-labelledby="navbar-subbar1">
<a class="dropdown-item" href="#"><i class="fas fa-user-tie"></i> Narzędzia administracyjne</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-user"></i> Moje konto</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-cogs"></i> Ustawienia</a>
<a class="dropdown-item" href="#"><i class="fas fa-key"></i> Zmień hasło</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-sign-out-alt"></i> Wyloguj</a>
</div>
</li>
</ul>
</div>
</nav>

Answer 1

.dropdown-menu.show {
left: -98px;
}
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<nav class="navbar navbar-dark bg-primary navbar-expand-md">
<a class="navbar-brand" href="index.php">
Nazwa
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-bar1" aria-controls="navbar-bar1" aria-expanded="false" aria-label="Przełączanie nawigacji">
<i class="fas fa-bars"></i>
</button>
<div class="collapse navbar-collapse" id="navbar-bar1">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="index.php">Strona główna</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Strona 2</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Strona 3</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">Zaloguj się lub zarejestruj</a>
</li>
<li class="nav-item dropdown">
<a id="navbar-subbar1" class="nav-link dropdown-toggle" href="#" data-toggle="dropdown" role="button" aria-expanded="false" aria-label="Przełączanie menu konta" aria-haspopup="true"><i class="fas fa-user"></i> Nacioszeczek</a>
<div class="dropdown-menu" aria-labelledby="navbar-subbar1">
<a class="dropdown-item" href="#"><i class="fas fa-user-tie"></i> Narzędzia administracyjne</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-user"></i> Moje konto</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-cogs"></i> Ustawienia</a>
<a class="dropdown-item" href="#"><i class="fas fa-key"></i> Zmień hasło</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#"><i class="fas fa-sign-out-alt"></i> Wyloguj</a>
</div>
</li>
</ul>
</div>
</nav>