Hi,
I am using the booster theme for my store. My issue is that on my store users can move to checkout directly from a product page or add to cart without choosing any product size or color, by default it is selecting “the first option” (the only option available on theme settings related to product swatches). I want it to mandatory to make sure that users must choose an option from the swatch size & color and proceed to the next step(checkout or add to cart) or if not selected it will show an error"
How can I do that?
Note: I am not a developer expert in Shopify.