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Article3 min read

Chrome 154 Changes Carousel Behavior: What to Check in an Online Store Gallery

New CSS scroll marker modes have been introduced in the Chrome beta. I explain why product galleries must be tested with a keyboard and across different devices.

Three angles of a single item prepared for catalog photography
In this article

A product gallery seems simple: swipe through photos and inspect details. In practice, it must work with a mouse, touch, keyboard, and screen readers. New browser features help, but they require thoughtful implementation.

In the Chrome 154 beta, released on September 2, 2026, CSS scroll marker modes have been expanded. Developers can now define behavior similar to a list of links or to tabs. This affects not only the appearance of the switches but also the focus order and content accessibility.

Why the Switching Mode Matters

In an interface with links, a user sequentially navigates individual elements. Tabs follow a different, familiar control pattern: an active element and movement between options. If the visual form promises one behavior but the keyboard acts differently, users get confused.

Store owners do not need the technical name of the property. It is sufficient to formulate a testable requirement: a buyer can open all important photos without a mouse and understand which element is selected.

It is especially important not to hide product information behind a switch that is difficult to reach. Size charts, included items, and terms must not become inaccessible due to decorative mechanics.

Perform a brief manual check

Open the product card and set the mouse aside. Navigate through elements using the Tab key, try the switches, open the enlarged photo, and return. Ensure the focus is visible and does not land on hidden elements.

On mobile, test horizontal gestures and vertical scrolling. The gallery must not interfere with scrolling the page itself. Buttons must remain accessible when text is enlarged or product names are long.

Add complex scenarios: a single photo, many photos, a missing file, and a slow connection. This is where empty areas, layout shifts, and lost buttons often appear.

The new property does not break compatibility

A beta feature in one browser does not guarantee support across the entire audience. Before implementation, developers must verify behavior in required browsers and ensure a functional fallback where the new mechanism is unavailable.

There is no need to immediately overhaul a working gallery after the announcement. First, identify the problem the change solves: excessive code, poor keyboard navigation, or accessibility errors.

A good gallery helps customers examine products and proceed to checkout. Its quality is evident in everyday interactions, not in how many new browser mechanisms are used internally.

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