Fails to maintain accessibility consistency for keyboard and screen reader users.

[PeeyushAgrawal]

When navigating through slides using keyboard tabbing, the Tiny‑Slider does not properly update the slider state (dots, next/prev button enable/disable state). The slider appears to function correctly visually when clicked via mouse, but fails to maintain accessibility consistency for keyboard and screen reader users.

Steps to Reproduce

1. Initialize a basic Tiny‑Slider with multiple slides (e.g., 5 slides visible 1 at a time).
2. Use keyboard navigation (Tab key) to move focus through slides: Start from the first slide and keep pressing Tab to move focus sequentially across all slides.
3. Observe the following issues:

Actual Behavior (Issues Observed)

Issue 1 – Dot Navigation Not Updating

• As you tab through slides, the dot indicator (pagination) remains stuck at the first dot.
• Even if the focus is on the last slide, the active dot is still the first one.

Issue 2 – Next/Prev Button State Incorrect

• Even when the focus is on the last slide, the Next button remains enabled and the Prev button remains disabled (initial state).
• Slider state is not syncing with keyboard navigation.

Issue 3 – Focus Moves Out of Slider Instead of going to next/prev button

• When focus reaches the last slide and you press Tab again, the focus moves out of the slider completely.
• Expected Behavior: After the last slide, the focus should move to the prev button, and if again tab clicked then only exit from the slider

Issue 4 – No Proper Accessibility Handling

• The slider does not update aria-selected, aria-hidden, or tabindex attributes dynamically when tabbing through slides.
• This creates confusion for screen reader users as the visual slide and accessibility state are out of sync.

Expected Behavior

• Dot indicator should update to reflect the currently focused slide.
• Next/Prev buttons should enable/disable correctly based on the slide currently in focus.
• Tabbing should follow natural focus order:
• After the last slide → Next button
• After Next button → Out of the slider (or loop back based on implementation choice)
• ARIA attributes & tabindex should dynamically update to match the visible/active slide for better accessibility support.

Environment

• Tiny‑Slider Version: 2.9.4
• Browser(s): Chrome 138
• OS: macOS
• Assistive Technology: Keyboard only (tested with Tab key)