openpencil/packages/docs/programmable/sdk/api/components/channel-slider.md
Danila Poyarkov 422f83331f feat(vue): promote color and fill primitives
- Add accessible OkHCL channel sliders and use Reka ColorSlider for standard color channels

- Split fill state and binding-aware swatches from application popover composition

- Add keyboard-operable gradient stops, shared demos, generated docs, and focused coverage
2026-07-13 23:41:04 +03:00

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---
title: ChannelSlider
description: Accessible scalar channel slider for OkHCL controls.
---
<script setup lang="ts">
import ColorFillDemo from '#vue/primitives/Fill/demo/ColorFillDemo.vue'
import { data } from './channel-slider.data'
</script>
# ChannelSlider
`ChannelSlider` provides the same Root/Track/Thumb composition and keyboard behavior as Reka's
Slider while accepting an arbitrary scalar channel. OpenPencil uses it only for OkHCL channels;
standard RGB, HSL, and HSB controls should use Reka `ColorSlider` directly.
<ColorFillDemo />
## Anatomy
- `ChannelSliderRoot` — controlled value, range, step, orientation, and accessible channel label
- `ChannelSliderTrack` — polymorphic track element
- `ChannelSliderThumb` — slider thumb with range ARIA and formatted value text
Arrow keys step the value. Page Up and Page Down use larger steps, while Home and End move to the
range boundaries. The primitive is temporary until [Reka issue #2798](https://github.com/unovue/reka-ui/issues/2798)
provides first-class OkHCL support.
```vue twoslash
<script setup lang="ts">
import { ref } from 'vue'
import {
ChannelSliderRoot,
ChannelSliderThumb,
ChannelSliderTrack
} from '@open-pencil/vue'
const chroma = ref(0.16)
</script>
<template>
<ChannelSliderRoot v-model="chroma" label="Chroma" :min="0" :max="0.4" :step="0.001">
<ChannelSliderTrack />
<ChannelSliderThumb />
</ChannelSliderRoot>
</template>
```
## Generated API reference
<SdkComponentAPI :components="data.components" />
## Related APIs
- [useColorModel](../composables/use-color-model)
- [FillRoot](./fill-root)