How to get Django template's JavaScript's session in Django view?

Question

I ran test view below (The 1st run):

# "my_app1/views.py"

from django.shortcuts import render

def test(request):
    return render(request, 'index.html')

Then, I could set and get session in <script></script> in index.html as shown below (The 1st run):

{% "templates/index.html" %}

<script>
sessionStorage.setItem("test", "Hello");
console.log(sessionStorage.getItem('test')) // Hello
</script>

Next, I ran test view again with request.session.get('test') but I could not get the session as shown below (The 2nd run):

# "my_app1/views.py"

from django.shortcuts import render

def test(request):
    print(request.session.get('test')) # None
    return render(request, 'index.html')

Actually, I could get a Django template's JavaScript's cookie in test view.

So, how can I get the Django template's JavaScript's session in test view?