How do I fix my “Add to Cart” drawer when it won’t open on mobile?

A mobile cart drawer fails to slide open when mobile touch event handlers (touchstart) are blocked by legacy desktop jQuery scripts, or when cart-related CSS properties hide drawers on small screen sizes.

“Most minor website breaks are caused by simple script conflicts, legacy code blocks, or broken API handshakes. We identify and clear these issues immediately as a straightforward, one-time fix.”
— Jeff Bollettino, Managing Director, Ignite Conversions