layout sharing via url

[deploy]

src/lib/share.ts

@@ -0,0 +1,22 @@
+import type {Action} from "svelte/action"
+import {readonly, writable} from "svelte/store"
+
+const setCanShare = writable(false)
+export const canShare = readonly(setCanShare)
+
+let shareCallback: ((event: Event) => void) | undefined
+export function triggerShare(event: Event) {
+  shareCallback?.(event)
+}
+
+export const share: Action<Window, (event: Event) => void> = (node, callback: (event: Event) => void) => {
+  setCanShare.set(true)
+  shareCallback = callback
+
+  return {
+    destroy() {
+      setCanShare.set(false)
+      shareCallback = undefined
+    },
+  }
+}