Django + JS : value with double curly braces not sent to a JS function. Others are OK [closed]

A mystery hits me !

I display with a loop many shipping services available for a given order on a page containing all my orders.

{% for serv in account.services %}
    <div class="service">
        <label class="form-check-label" for="service{{order.pk}}"><small>{{serv}}</small></label>
        {% if forloop.first %}
            <input class="form-check-input" type="radio" name="service{{order.pk}}" value="{{serv.pk}}" ismulti="{{serv.is_multiparcel}}" checked>
        {% else %}
            <input class="form-check-input" type="radio" name="service{{order.pk}}" value="{{serv.pk}}" ismulti="{{serv.is_multiparcel}}">
        {% endif %}
        {% if order.base_subtotal > serv.insurance_from %}
            <div class=" form-text text-danger insur-alert{{order.pk}}">Assur. appliquée car € HT sup. à {{serv.insurance_from}}</div>
        {% endif %}
        {% if order.weight > serv.max_weight %}
            <div class="form-text badge bg-danger" name="weight-alert">Poids commande > max. service {{serv.max_weight}} kg</div>
            <script>
                disableCheckCauseWeight("service{{ order.pk }}", "{{serv.pk}}");
            </script>
        {% endif %}
     </div>
 {% endfor %}

One of these services can be selected with a radio button and is identified by 2 prameters : service{{order.pk}} and {{serv.pk}}.
Both of them are well displaying in my html code:

enter image description here

Later in my code, for each loop, I call a JS function for disabling the given service if the order’s weight is higher than the weight accepted by the service.

But, {{serv.pk}} isn’t sent to disableCheckCauseWeight()function, despite it’s well displayed above in value="{{serv.pk}}".
A console log shows well service{{order.pk}} but not {{serv.pk}}. I tried with other values like {{order.pk}}or “tintin” or any other variable, and it’s ok.

Why do I have this issue with {{serv.pk}} ?