Show sticky add to cart button after scrolling past add to cart button

Topic summary

A user seeks to implement a sticky “Add to Cart” button on their Shopify product page that only appears after scrolling past the default button.

Initial Problem:

  • The sticky button was visible on page load instead of appearing only after scrolling past the original button
  • Button behavior was inconsistent with unwanted visibility delays and premature appearance

Solution Process:

  • Dan-From-Ryviu provided iterative code updates through the theme.liquid file
  • Multiple refinements addressed timing issues and visibility triggers
  • Final adjustments ensured the button didn’t interfere with mega menus/drawer menus

Resolution:

  • The issue was successfully resolved through collaborative debugging
  • Dan-From-Ryviu gained collaborator access to implement the final working code
  • Another user (Nasar1999) later shared their own implementation using ChatGPT, triggering the sticky button at 50% scroll with custom styling (circular button, positioned right side, with icon)

Key Technical Elements:

  • JavaScript scroll detection and visibility control
  • CSS positioning and z-index management
  • Integration with Shopify’s product form structure
Summarized with AI on November 7. AI used: claude-sonnet-4-5-20250929.

Hey great! But can it also slide in up? Thanks for the help!