Accessibility
- The element serving as the focusable slider control has role
slider.
- The slider element has the
aria-valuenow property set to a decimal value representing the current value of the slider.
- The slider element has the
aria-valuemin property set to a decimal value representing the minimum allowed value of the slider.
- The slider element has the
aria-valuemax property set to a decimal value representing the maximum allowed value of the slider.
- If the value of
aria-valuenow is not user-friendly (e.g., the day of the week is represented by a number) the aria-valuetext property is set to a string that makes the slider value understandable (e.g., “Monday”).
- If the slider has a visible label, it is referenced by
aria-labelledby on the slider element. Otherwise, the slider element has a label provided by aria-label.
- If the slider is vertically oriented, it has
aria-orientation set to vertical. The default value of aria-orientation for a slider is horizontal.
- Make sure the thumb is in the page tab sequence.
- Right and Up arrows increase the value of the slider by one step; Left and Down arrows decrease the value of the slider by one step.
- When using a multi-thumb slider, each thumb is in the page tab sequence and has the same keyboard interaction as a single-thumb slider.
