現在有個需求，就是在導航欄上有若干個按鈕，我想實現的功能是當點擊某個按鈕后修改文字顏色，這樣網站會更人性化。現總結方法如下：
index.html:
<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>
app.views.py
def home(reqeust):
isactive = "home"
return render(request, "home.html", {"isactive":isactive})
def about(reqeust):
isactive = "about"
return render(request, "about.html", {"isactive":isactive})
