c2n/web-componentsv0.0.6
GitHub repository

Slider

Range input with a themeable track, thumb, step ticks and value bubble.

c2-slider wraps a native <input type="range">, so dragging, keyboard steps (Arrow keys, Page Up/Down, Home and End), right-to-left layouts and the slider role all come from the browser. The component draws the track, the filled part, the thumb, optional step ticks and a value bubble that show-value reveals while hovering, dragging or focused. value, min, max and step behave like the native attributes; input fires on every step of a drag and change when the value is committed. Set the formatValue property to format the bubble and aria-valuetext together.

Installation

npm install @c2n/slider

Usage

Volume40

Label the slider with aria-label or point aria-labelledby at a visible label, as in the Default row; the value itself is announced through aria-valuetext, which uses the same formatValue as the bubble. A horizontal slider fills the width of its container, so size it from the outside; a vertical one is an inline box whose height is --c2-slider__container--length.

Because the native input owns the interaction, the thumb you see is a drawing: the invisible native thumb has the same size, so a press lands where the visual thumb sits. Theme the drawing with --c2-slider__track--*, --c2-slider__fill--color and --c2-slider__thumb--*; the thumb has hover and active halos (__hover--box-shadow, __active--box-shadow) and a focus ring. Tick marks pick a different colour on the filled part (--c2-slider__tick__filled--color), and the bubble is themed with --c2-slider__value--*, including a resting --c2-slider__value--opacity for an always-visible readout.

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