A button, link, tab, or toggle that looks actionable but fails to produce its expected result is a dead feature: a useful descriptive phrase, not an official accessibility term. To find one, check both whether the control can be reached and activated—especially with a keyboard—and whether activation produces the expected result. A visible focus indicator and keyboard access are essential checks, but they do not prove that the action itself works.
What makes a control a “dead feature”?
A control’s appearance sets an expectation. A button suggests that it will perform an action; a link suggests that it will take the user somewhere; a toggle suggests that it will change a setting. When the expected action does not happen, the interface breaks that promise. “Dead feature” describes this problem for readers; it is not a formal WCAG category.
“Does nothing” can describe two different failures. The control may not activate at all, or it may activate without making the result apparent. For example, an action might run but leave the user without a visible state change, confirmation, validation message, or other indication of what happened. Test the action and its outcome separately.
Check access and function separately
Accessibility and functionality overlap, but one does not guarantee the other. WCAG 2.2 Success Criterion 2.1.1, Keyboard, Level A, requires that all functionality be operable through a keyboard interface, subject to its stated exception for functions that depend on the path of movement. Success Criterion 2.4.7, Focus Visible, Level AA, requires a mode in which keyboard focus is visible. The [WCAG 2.2 criteria](https://www.w3.org/TR/WCAG22/) define these requirements.
The Tool Desk
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
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- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Visible focus lets keyboard users tell which element is selected. W3C’s [Understanding Focus Visible](https://www.w3.org/WAI/WCAG22/Understanding/focus-visible.html) guidance recommends a visible indicator for every item that receives focus. WAI also advises using distinct, consistent styles to help people identify interactive elements and ensuring keyboard users can reach them and see focus. Those checks help expose access problems; you still need to activate the control and confirm its result.
WCAG 2.2 became a W3C Recommendation on 5 October 2023. Its Success Criterion 2.4.11, Focus Not Obscured (Minimum), says that a focused component must not be entirely hidden by author-created content. A sticky header or overlay can therefore make focus difficult to locate even when the control is technically focusable. See the [WCAG 2.2 standard](https://www.w3.org/TR/WCAG22/).
Audit controls with a repeatable workflow
WAI’s [Easy Checks](https://www.w3.org/WAI/test-evaluate/easy-checks/) recommends a practical first review that includes navigating by keyboard, checking visible focus and logical order, and examining key interactions. Use that as a starting point, then verify each control’s actual outcome:
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
- Inventory what looks actionable. Include links, buttons, form actions, tabs, toggles, menu items, and other elements that appear interactive.
- Write down the promise. For each control, note its apparent purpose and expected result: navigation, a state change, validation, submission, or clear error feedback. Check whether its visual treatment is distinct and consistent with other interactive elements.
- Navigate without a pointer. Use the keyboard to move through the page. Confirm that controls can be reached, that focus is visible, and that the sequence makes sense.
- Check for obscured focus. Look for focused controls hidden completely behind sticky headers, overlays, or other content created by the page.
- Activate and verify. Use the keyboard and pointer to operate each control. Confirm that the expected action occurs and that the result is communicated clearly.
- Record and retest defects. Describe the blocked user task and its impact. After a fix, repeat the same action with keyboard and pointer input.
Diagnose what “nothing happened” means
When a control appears unresponsive, trace the interaction from selection to outcome rather than concluding from appearance alone. These distinctions help make a defect reproducible:
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- Cannot tell where focus is: Keyboard navigation may move, but the focus indicator is absent or hard to see.
- Cannot activate it: The control receives focus or appears clickable, but activation does not start the expected action.
- Action occurs without clear feedback: The interface changes or a task proceeds, but the user receives no clear indication of the result.
- Focus is covered: A sticky header, overlay, or other page content entirely hides the focused control.
Describe the defect in terms of the user’s task and the observed result—for example, “The Save button receives focus, but activating it does not show confirmation or update the page.” That is more actionable than reporting only that a button is broken.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Turn fixes into regression checks
For each defect, preserve the steps that reveal it: the page state, how the control is reached, the input used to activate it, and the expected result. After a correction, repeat those steps and check both keyboard and pointer operation. If the interface has meaningful variations, such as an open menu or a validation error, include the relevant state in the retest.
Prioritize controls that block a primary task, then work through less consequential interactions. This is a practical prioritization approach, not a ranking rule specified by WCAG. For a broader review, compare approaches by whether they test keyboard operation, make focus location and order observable, exercise actions and confirm outcomes, cover the relevant browsers and interface states, and let teams repeat checks after changes.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
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