ajax - How to properly pass variantId to the backend rails?

Question

I get this ajax when I add an item to cart :

  fetch(Spree.routes.api_v2_storefront_cart_add_item, {
    method: 'POST',
    headers: SpreeAPI.prepareHeaders({ 'X-Spree-Order-Token': SpreeAPI.orderToken }),
    body: JSON.stringify({
      variant_id: variantId,
      quantity: quantity,
      options: options
    })
  }).then(function (response) {
    switch (response.status) {
      case 422:
        response.json().then(function (json) { failureCallback(json.error) })
        break
      case 500:
        SpreeAPI.handle500error()
        break
      case 200:
        response.json().then(function (json) {
          //console.log(variantId);
          successCallback(json.data)
        })
        break
    }
  })
}

Spree.routes.api_v2_storefront_cart_add_item = Spree.pathFor('api/v2/storefront/cart/add_item')

How can I get this variantId on the backend when the button is clicked?

question from:https://stackoverflow.com/questions/65938604/how-to-properly-pass-variantid-to-the-backend-rails

Answer 1

Waitting for answers