def is_loop_helper(node):
    """
    Returns True is node is a loop helper e.g. {{ loop.index }} or {{ loop.first }}
    """
    return (
        hasattr(node, "node")
        and isinstance(node.node, nodes.Name)
        and node.node.name == "loop"
    )

    Returns True is node is a loop helper e.g. {{ loop.index }} or {{ loop.first }}
    
website/setup/jinja_to_js.py