Django bootstrap按钮点击后激活active

<ul class="navbar-nav mr-auto">
    <li class="nav-item">
        <a class="nav-link {% if isactive == 'home' %}active{% endif %}" href="{% url 'home' %}">Home</a>
    </li>
    <li class="nav-item">
        <a class="nav-link {% if isactive == 'about' %}active{% endif %}" href="{% url 'about' %}">About</a>
    </li>
</ul>

def home(reqeust):
    isactive = "home"
    return render(request, "home.html", {"isactive":isactive})
    
def about(reqeust):
    isactive = "about"
    return render(request, "about.html", {"isactive":isactive})