How to make buttons in bootstrap 4 menu?

Question

HTML

Hello, tell me how to get stretched buttons in mobile design, something like this

At the moment I have this

code

<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarColor01" aria-controls="navbarColor01" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarColor01">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Features</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Pricing</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">About</a>
            </li>
        </ul>
        <form class="form-inline">
            <input class="form-control my-1 mr-sm-2" type="login" placeholder="Логин" aria-label="Логин">
            <input class="form-control my-1 mr-sm-2" type="password" placeholder="Пароль" aria-label="Пароль">
            <button class="btn btn-success my-2 my-sm-2 mr-sm-1" type="submit">Войти</button>
            <button class="btn btn-danger my-2 my-sm-2 mr-sm-1" type="submit">Регистрация</button>
        </form>
    </div>
</nav>

I will be a little happy if you improve it))

Answer 1

Since you are using bootstrap, then you should try to use its styles.
To make the button be the full length of the parent, use the class - btn-block
https://jsfiddle.net/planet_9329/hska8pz4/