I am trying to get sale order data on ecommerce, I found that there is something like this odoo addon

order = request.website.sale_get_order()

I debugged and found this is the function I am looking for, but I do not know how to use it in javascript

I tried

_onClick: function () {
    return this._rpc({
        model: 'website',
        method: 'sale_get_order',
        args: [""]
    })
    .then(function (result) {
        console.log(result)
    });
}

ValueError: Expected singleton: website()