svelte-ken-burns
v0.0.3
Published
This is a CSS-only slideshow for Svelte and SvelteCMS, with configurable per-image pan and zoom settings to create the motion effects popularly associated with American film maker Ken Burns.
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About Svelte Ken Burns
This is a CSS-only slideshow for Svelte and SvelteCMS, with configurable per-image pan and zoom settings to create the motion effects popularly associated with American film maker Ken Burns.
- works with Javascript disabled
- respects
prefers-reduced-motion
settings - click to play / pause
- works for any number of images
- supports server-side rendering
Usage as Svelte Component
<script>
import Slideshow from 'svelte-ken-burns'
</script>
<Slideshow {slides} {options} />
The types for slides and options should be avalable when coding, but here they are:
export type PanZoom = {
x?: number, // the horizontal direction for the focal point, in percentage of width, as a number
y?: number, // the vertical direction for the focal point, in percentage of height, as a number
zoom?: number, // the scale applied to the image, as a number, e.g. 1.25 (numbers below 1 will result in borked display)
tx?: number, // set automatically in the component
ty?: number, // set automatically in the component
}
export type Slide = KenBurnsImageParams & {
image: string|{
src: string
alt?: string
[key:string]: Value // Value from SvelteCMS
}
start?: PanZoom,
end?: PanZoom,
}
export type SlideshowOptions = {
slideDuration:number // how long each slide is visible
fadeDuration:number // how long the fade-in is when slides transition
fadeOutDuration:number // set automatically by the component as fadeDuration * 2
iterations:number|"infinite" // how many times the slideshow cycles
endOpacity:number // the opacity for the last slide after the slideshow is done cycling
}
Usage with SvelteCMS
///file src/lib/cms.ts
import CMS from 'sveltecms'
import conf from './sveltecms.config.json'
import {kenBurnsPlugin} from 'svelte-ken-burns'
import defaultContent from 'sveltecms/plugins/defaultContent'
const cms = new CMS(conf, [
defaultContent, // optional but recommended
kenBurnsPlugin,
// etc.
])
The SvelteCMS plugin provides the following entities and configurations:
- FieldTypes
- panZoom
- WidgetTypes
- panZoom
- Fields
- slides (type: fieldgroup)
- Fieldgroups
- skb_slideshow
- Components
- skb:slideshow
- skb:slideshow-fieldset
To use the plugin, add a Field of type "slides" to any content type, or add a "skb_slideshow" fieldgroup block to any "blocks" field.