Preview
Freq
Matrix
Cell
Speed
Levels
Still time
Bloom
Bloom radius
Animate
Palette
<DitherEffect effect="ripples" params={{"freq":28}} palette={["#001018","#0b3a4d","#1d7d96","#8fd8e8","#eaffff"]} cell={2} matrix={8} speed={1} />Installation
pnpm add astro-dithernpm i astro-ditherbun add astro-ditherOr copy the source into your project:
npx astro-dither add effectUsage
---import { DitherEffect } from "astro-dither";---
<DitherEffect effect="ripples" />Sine rings radiating from three fixed centres, crossing like drops on still water. freq controls how tight the rings sit.
The props group like this:
Pattern: freq.
Examples
Calm
Low freq widens the rings into slow, rolling circles.
<DitherEffect effect="ripples" params={{"freq":10}} palette={["#001018","#0b3a4d","#1d7d96","#8fd8e8","#eaffff"]} cell={2} matrix={8} speed={1} />Rain
High freq packs the rings into fine interference bands.
<DitherEffect effect="ripples" params={{"freq":50}} palette={["#001018","#0b3a4d","#1d7d96","#8fd8e8","#eaffff"]} cell={2} matrix={8} speed={1} />Props
| Prop | Type | Default | Description |
|---|---|---|---|
freq | number | 28 | Ring density. 5 to 60. |
palette | string[] | the effect's | 2 to 8 colours, paper first, brightest last. transparent works. |
cell | number | 2 | Size of one dither cell in CSS pixels. Rounded to whole device pixels so cells stay even. |
matrix | 2 | 4 | 8 | "noise" | 8 | The Bayer threshold size, or noise for a random look. |
speed | number | 1 | Playback speed. 0 draws one still frame. |
stillTime | number | the effect's | The moment drawn when motion is off or reduced, in seconds. |
levels | number | 0 (all) | Tones the field snaps to before dithering. Low values give hard, posterised steps. |
bloom | number | 0 | Bloom around lit cells, 0 to 1. Set a positive prop to create the overlay before overriding it with CSS --dither-bloom. |
bloomRadius | number | 10 | Bloom blur in CSS pixels. CSS --dither-bloom-radius overrides it. |
class | string | undefined | Classes on the surface element, for size and position. |
Notes
- Decorative and
aria-hidden. Put real text on top of it, not inside it. - With reduced motion it draws one still frame at 4s and stops.
- It pauses when scrolled out of view or when the tab is hidden.
- It shares one WebGL context with every other ordered effect on the page.