screen sharing

client/app/composables/use-fullscreen-video.ts

@@ -0,0 +1,51 @@
+import { createGlobalState, useEventListener } from '@vueuse/core'
+
+export const useFullscreenVideo = createGlobalState(() => {
+  const videoEl = shallowRef<HTMLVideoElement>()
+
+  const visible = computed(() => !!videoEl.value)
+
+  async function show(stream: MediaStream) {
+    if (videoEl.value) {
+      videoEl.value.srcObject = stream
+    }
+    else {
+      const el = document.createElement('video')
+      el.srcObject = stream
+      el.autoplay = true
+      el.playsInline = true
+      el.controls = false
+      el.muted = true
+      // el.style.position = 'fixed'
+      // el.style.top = '0'
+      // el.style.left = '0'
+      // el.style.width = '1px'
+      // el.style.height = '1px'
+      // el.style.opacity = '0'
+      // el.style.pointerEvents = 'none'
+
+      document.body.appendChild(el)
+
+      videoEl.value = el
+    }
+
+    await videoEl.value.requestFullscreen()
+  }
+
+  function hide() {
+    videoEl.value?.remove()
+  }
+
+  useEventListener(document, 'fullscreenchange', () => {
+    if (!document.fullscreenElement && videoEl.value) {
+      videoEl.value?.remove()
+      videoEl.value = undefined
+    }
+  })
+
+  return {
+    visible,
+    show,
+    hide,
+  }
+})