现在有个需求，就是在导航栏上有若干个按钮，我想实现的功能是当点击某个按钮后修改文字颜色，这样网站会更人性化。现总结方法如下：
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})
