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<script lang="ts"> | |
import { autoUpdate, computePosition, flip, type Placement } from "@floating-ui/dom"; | |
import { Toaster } from "melt/builders"; | |
import { type Snippet } from "svelte"; | |
import { type Attachment } from "svelte/attachments"; | |
interface Props { | |
children: Snippet<[{ addToast: typeof toaster.addToast; trigger: typeof trigger }]>; | |
toast?: Snippet<[{ toast: (typeof toaster.toasts)[0]; float: typeof float }]>; | |
closeDelay?: number; | |
} | |
const { children, closeDelay = 2000, toast: toastSnippet }: Props = $props(); | |
const id = $props.id(); | |
export const trigger = { | |
"data-local-toast-trigger": id, | |
} as const; | |
type ToastData = { | |
content: string; | |
variant: "info" | "danger"; | |
}; | |
export const toaster = new Toaster<ToastData>({ | |
hover: null, | |
closeDelay: () => closeDelay, | |
}); | |
export const addToast = toaster.addToast; | |
const float: Attachment<HTMLElement> = function (node) { | |
let placement: Placement = $state("top"); | |
const triggerEl = document.querySelector(`[data-local-toast-trigger=${id}]`); | |
if (!triggerEl) return; | |
const compute = () => | |
computePosition(triggerEl, node, { | |
strategy: "absolute", | |
placement: "top", | |
middleware: [flip({ fallbackPlacements: ["left"] })], | |
}).then(({ x, y, placement: _placement }) => { | |
placement = _placement; | |
Object.assign(node.style, { | |
left: placement === "top" ? `${x}px` : `${x - 4}px`, | |
top: placement === "top" ? `${y - 6}px` : `${y}px`, | |
}); | |
// Animate | |
// Cancel any ongoing animations | |
node.getAnimations().forEach(anim => anim.cancel()); | |
// Determine animation direction based on placement | |
let keyframes: Keyframe[] = []; | |
switch (placement) { | |
case "top": | |
keyframes = [ | |
{ opacity: 0, transform: "translateY(8px)", scale: "0.8" }, | |
{ opacity: 1, transform: "translateY(0)", scale: "1" }, | |
]; | |
break; | |
case "left": | |
keyframes = [ | |
{ opacity: 0, transform: "translateX(8px)", scale: "0.8" }, | |
{ opacity: 1, transform: "translateX(0)", scale: "1" }, | |
]; | |
break; | |
} | |
node.animate(keyframes, { | |
duration: 500, | |
easing: "cubic-bezier(0.22, 1, 0.36, 1)", | |
fill: "forwards", | |
}); | |
}); | |
const reference = node.cloneNode(true) as HTMLElement; | |
node.before(reference); | |
reference.style.visibility = "hidden"; | |
const destroyers = [ | |
autoUpdate(triggerEl, node, compute), | |
async () => { | |
// clone node | |
const cloned = node.cloneNode(true) as HTMLElement; | |
reference.before(cloned); | |
reference.remove(); | |
cloned.getAnimations().forEach(anim => anim.cancel()); | |
// Animate out | |
// Cancel any ongoing animations | |
cloned.getAnimations().forEach(anim => anim.cancel()); | |
// Determine animation direction based on placement | |
let keyframes: Keyframe[] = []; | |
switch (placement) { | |
case "top": | |
keyframes = [ | |
{ opacity: 1, transform: "translateY(0)" }, | |
{ opacity: 0, transform: "translateY(-8px)" }, | |
]; | |
break; | |
case "left": | |
keyframes = [ | |
{ opacity: 1, transform: "translateX(0)" }, | |
{ opacity: 0, transform: "translateX(-8px)" }, | |
]; | |
break; | |
} | |
await cloned.animate(keyframes, { | |
duration: 400, | |
easing: "cubic-bezier(0.22, 1, 0.36, 1)", | |
fill: "forwards", | |
}).finished; | |
cloned.remove(); | |
}, | |
]; | |
return () => destroyers.forEach(d => d()); | |
}; | |
const classMap: Record<ToastData["variant"], string> = { | |
info: "border border-blue-400 bg-gradient-to-b from-blue-500 to-blue-600", | |
danger: "border border-red-400 bg-gradient-to-b from-red-500 to-red-600", | |
}; | |
</script> | |
{children({ trigger, addToast: toaster.addToast })} | |
{#each toaster.toasts.slice(toaster.toasts.length - 1) as toast (toast.id)} | |
<div | |
data-local-toast | |
data-variant={toast.data.variant} | |
class={[!toastSnippet && `${classMap[toast.data.variant]} rounded-full px-2 py-1 text-xs`]} | |
{ | float}|
> | |
{#if toastSnippet} | |
{toastSnippet({ toast, float })} | |
{:else} | |
{toast.data.content} | |
{/if} | |
</div> | |
{/each} | |
<style> | |
[data-local-toast] { | |
/* Float on top of the UI */ | |
position: absolute; | |
/* Avoid layout interference */ | |
width: max-content; | |
top: 0; | |
left: 0; | |
} | |
</style> | |