仅当用户登录时才运行 JavaScript 函数 - Django

Question

So I have a function that checks a user's mailbox and a variable defined after it that sets the frequency of this function. However, I don't want the function to send unnecessary requests if the user isn't even signed in to the website. Where/how would I pass the if user.is_authenticated parameter to this code to check?

function checkMail() { // Checks for new mail in user's inbox
$.ajax({
   url: "/checkMail/",
   type: "POST",
   success: function(data) {
            obj = JSON.parse(data);
            if(!obj.read){
                    $('#mailsquare').css('background-color', '#A80000');
                    $('.dropdown-menu').prepend('<li class="message" id="{{item.id}}">'+obj.newest.substring(0,30)+'</li>');
            } else {
                    $('#mailsquare').css('background-color', '#1b1b1b');
            }
   },
   error: function(xhr, status, error) { console.log(xhr.status); console.log(xhr.responseText); console.log(status); console.log(error); }
   });
}
var interval = setInterval(checkMail, 10000);  // Set interval for frequency of mail checks

Answer 1

In your actual Django template, you can have a JavaScript block wrapped in a template tag that checks the user is logged in.

{% if user.is_authenticated %}
    <script type="text/javascript">
         setInterval(checkMail, 10000);
     </script>
{% endif %}