I am fetching a json response from my django response by this url /inbox/<str:username>  to get a json response of all the messages in the conversation with that user.
The problem starts with the inbox page which holds the threads and chatbox on the same page like instagram which looks like this 
but as it can be seen that I want the url to be like with the username. Let's say when I click on thread with dummy I want the url to be like "inbox/dummy" but in this my url is "/inbox" which will not let me initiate the socket for messaging, my views.py that renders this inbox template is
views for inbox
thread_objs= Thread.objects.by_user(user=request.user)
    l=len(thread_objs)
    chat_objs=[]
    for i in range(l):
        chat_objs.append(list(thread_objs[i].chatmessage_set.all()).pop())
    
    chat_objs_serialized=[]
    for i in range(l):
        chat_objs_serialized.append(json.dumps(ChatMessageSerializer(chat_objs[i]).data))
    for i in range(l):
        print(chat_objs_serialized[i])
    
    thread_objs_list=[]
    
    for i in range(l):
        thread_objs_list.append(json.dumps(ThreadSerializer(thread_objs[i]).data))
    
    return render(request,'uno_startup/inbox.html',context={"Threads":thread_objs_list,"Messages":chat_objs_serialized})
now when I click a thread it's content should load on the right side of screen as with the javascript of inbox.html that is this page in this image.
javascript of inbox
<body>
<div class='container'>
    <div class='row'>
        <div class="col-md-4" id ="Threadholder">
            <ul id ="Threadbox">
            {% for object in threads %}
                <li><a href=" ">{% if user != object.first %}{{ object.first }}{% else %}{{ object.second }}{% endif %}</a></li>
            {% endfor %}
            </ul>
        </div>    
    
        <div class="col-md-8" id="Chatholder" >
            <ul id="Chatbox">
            </ul>
     
            
         <form id="form" method="POST">
                 <input type="hidden" value="{{ user.username }}" id="myusername">
                 <input type="text" id="chat_message">
                 <input type="submit" class="btn btn-primary">
         </form>
            
        </div>
    </div>
</div>
<script>
    var threads={{ Threads|safe }};
    var messages={{ Messages|safe }};
    const l=threads.length
    const threadholder=$("#Threadbox")
    for(i=0;i<l;i++){
        var data=JSON.parse(threads[i])
        var Message=JSON.parse(messages[i])
        var username =data.second.username
        if (username=="{{ user.username }}"){
            username=data.first.username
        }
        
        var thread=document.createElement("li")
        var main=document.createElement("a")
        
        var div=document.createElement("div")
        var username_holder=document.createElement("p")
        div.className="thread"
        
        var p=document.createElement("p")
        
        p.innerText=Message.message
        
        username_holder.innerText=username
        div.appendChild(username_holder)
        div.appendChild(p)
        main.appendChild(div)
        thread.appendChild(main)
        threadholder.append(thread)
        
    };
function add_message(message){
            
            message=JSON.parse(message)
            const chatholder=$("#Chatbox")
            
            console.log(message.user.username)
            const chat_message= document.createElement("li")
            var div= document.createElement("div")
            var p = document.createElement("p")
            var sender=message.user.username
            var text=message.message
            p.innerText=text
            div.appendChild(p)
            chat_message.appendChild(div)
            if(sender=="{{ user.username }}"){
                chat_message.className="user"
            }
            else{
                chat_message.className="other"
            }
            chatholder.prepend(chat_message)
            
        }
        $(document).ready(function(){
        $("li").click(function(){
            $("#Chatbox").empty()
        
            
            var other_user= this.children[0].children[0].children[0].innerText
            fetch(`/inbox/${other_user}`).then(response => response.json())
                .then(data => data.messages.reverse().forEach(add_message)) 
                
                
          })
        
        })
and this is the function that returns the json response
view for json response
thread=Thread.objects.get_or_new(user=request.user,other_username=username)
    messages=thread[0].chatmessage_set.all()
    l= len(messages)
    messages_serialized=[]
    for i in range(l):
        messages_serialized.append(json.dumps(ChatMessageSerializer(messages[i]).data))
    print(messages)
    return JsonResponse({"messages":messages_serialized})
and this Chat function is called via this url /inbox/<str:username>
I want a method that can help me get the thread open without reloading, and updates the url, I have used AJAX but it didn't help as it also took to me the page where it gave me the Json Response from django, changing the original page.
The failed AJAX implementation
<script>
    var threads={{ Threads|safe }};
    var messages={{ Messages|safe }};
    const l=threads.length
    const threadholder=$("#Threadbox")
    for(i=0;i<l;i++){
        var data=JSON.parse(threads[i])
        var Message=JSON.parse(messages[i])
        var username =data.second.username
        if (username=="{{ user.username }}"){
            username=data.first.username
        }
        
        var thread=document.createElement("li")
        var main=document.createElement("a")
        
        var div=document.createElement("div")
        var username_holder=document.createElement("p")
        div.className="thread"
        
        var p=document.createElement("p")
        
        p.innerText=Message.message
        
        username_holder.innerText=username
        div.appendChild(username_holder)
        div.appendChild(p)
        main.appendChild(div)
        thread.appendChild(main)
        threadholder.append(thread)
        
    };
function add_message(message){
            
            message=JSON.parse(message)
            const chatholder=$("#Chatbox")
            
            console.log(message.user.username)
            const chat_message= document.createElement("li")
            var div= document.createElement("div")
            var p = document.createElement("p")
            var sender=message.user.username
            var text=message.message
            p.innerText=text
            div.appendChild(p)
            chat_message.appendChild(div)
            if(sender=="{{ user.username }}"){
                chat_message.className="user"
            }
            else{
                chat_message.className="other"
            }
            chatholder.prepend(chat_message)
            
        }
        $(document).ready(function(){
        $("li").click(function(){
            $("#Chatbox").empty()
        
            
            var other_user= this.children[0].children[0].children[0].innerText
            <script>
    var threads={{ Threads|safe }};
    var messages={{ Messages|safe }};
    const l=threads.length
    const threadholder=$("#Threadbox")
    for(i=0;i<l;i++){
        var data=JSON.parse(threads[i])
        var Message=JSON.parse(messages[i])
        var username =data.second.username
        if (username=="{{ user.username }}"){
            username=data.first.username
        }
        
        var thread=document.createElement("li")
        var main=document.createElement("a")
        
        var div=document.createElement("div")
        var username_holder=document.createElement("p")
        div.className="thread"
        
        var p=document.createElement("p")
        
        p.innerText=Message.message
        
        username_holder.innerText=username
        div.appendChild(username_holder)
        div.appendChild(p)
        main.appendChild(div)
        thread.appendChild(main)
        threadholder.append(thread)
        
    };
function add_message(message){
            
            message=JSON.parse(message)
            const chatholder=$("#Chatbox")
            
            console.log(message.user.username)
            const chat_message= document.createElement("li")
            var div= document.createElement("div")
            var p = document.createElement("p")
            var sender=message.user.username
            var text=message.message
            p.innerText=text
            div.appendChild(p)
            chat_message.appendChild(div)
            if(sender=="{{ user.username }}"){
                chat_message.className="user"
            }
            else{
                chat_message.className="other"
            }
            chatholder.prepend(chat_message)
            
        }
        $(document).ready(function(){
        $("li").click(function(){
            $("#Chatbox").empty()
        
            
            var other_user= this.children[0].children[0].children[0].innerText
           $.ajax({
            type: "GET",
            url: {% url 'Chat' username=other_user %}, 
            data: {'Messages': messages}
        })
        .done(function(response) {
            console.log(reposne)
        });
                
          })
        
        })
                         
                
          })
        
        })
 
    