This FAQ article will quickly show you how to use Memberstack data attributes that have been stored in the Webflow CMS.
TLDR: the attribute can only be added to an element that's inside of an embed.
In this example, we'll add Pricing Attributes to sign-up buttons in a pricing table.
1) Create a CMS ID for all of your prices.
2) Custom code your signup buttons using a code embed.
3) Use the "+ Add Field" button to add the data attribute.