Pass in Django Template Variable to JS function

Question

In one of my templates, I have a for loop that goes over all the items. When a person likes or dislikes an item, I want to handle that with my function. Setting the button's HTML to something like this works:

            <button onclick='update_like(arg1, arg2)'></button>{{ item.id}}

However, I need to pass my template variables to the function. So I tried something like this:

            <button onclick='update_like({{item.id}}, {{item.name}})'></button>{{ item.name}}

But clicking the button just ouputs: Uncaught SyntaxError: Unexpected token 'default'

This is a trimmed down version of the full template I'm using:

{% extends 'base.html' %}
{% load static %}

{% block content %}
<div class="list">
    {% for item in items %}
               <button onclick='update_like({{item.id}}, {{item.name}})'></button>{{ item.name}}
    {% endfor %}
</div>

 <script>
 var count = {};
 function update_like(item_id, item_name) {
     count[item_id] = 1;
     console.log(count);
     return; 
 }
 </script>
{% endblock %}

Answer 1

Assuming item.id is number, item.name is string. You have to quote your value like this:

<button onclick="update_like({{item.id}}, '{{item.name}}')"></button>{{ item.name}}

To make sure above code is safe: replace ' to \' (by a custom filter) in item.name or not allow single quote in item.name