values of hidden fields with comma's

One option is to dynamically create the Typeform using the embed API

Below is the code that loads one form static. When using this method, the hidden fields are loaded using a JSON, so you can format the values the way you want. You would have to modify so that it get executed on a click on a button.

<script src="//embed.typeform.com/next/embed.js"></script>
<script>
    window.tf.createWidget("[form id]", {
    container: document.querySelector('#form'),
        hidden: {
	        'sku': '15433',
            'type': 'LTC DR 550I Vario-2 SINO',
            'price'; '2,325.00',
            'name': 'Draaibank 250x550 mm met digitale uitlezing, inverter en AC motor',
            'brand': 'Huvema'
        }
    })
</script>

Another option, if you can get your parameters in the URL of the page, would be to use the following parameter and let TF read from the URL of the page..

data-tf-transitive-search-params="sku,type,price,name,brand"

Doc here: https://www.typeform.com/help/a/dynamically-pass-hidden-fields-from-a-url-to-an-embedded-typeform-for-advanced-users-4404652303892/