refactor(danmuku): [PKG-DANMUKU-06] migrate runtime and preserve public types

packages/artplayer-plugin-danmuku/src/setting-style.ts

@@ -0,0 +1,30 @@
+import style from './style.less?inline'
+
+if (typeof document !== 'undefined') {
+  const id = 'artplayer-plugin-danmuku'
+  const pending = Symbol.for('artplayer-plugin-danmuku.pending-style')
+  const styleDocument = document as Document & { [key: symbol]: HTMLElement | undefined }
+  let $style = document.getElementById(id) || styleDocument[pending]
+  if (!$style) {
+    $style = document.createElement('style')
+    $style.id = id
+    if (document.readyState === 'loading') {
+      styleDocument[pending] = $style
+      const ready = () => {
+        document.removeEventListener('DOMContentLoaded', ready)
+        if (styleDocument[pending] === $style)
+          delete styleDocument[pending]
+        const existing = document.getElementById(id)
+        if (existing)
+          existing.textContent = $style!.textContent
+        else
+          (document.head || document.documentElement).appendChild($style!)
+      }
+      document.addEventListener('DOMContentLoaded', ready, { once: true })
+    }
+    else {
+      (document.head || document.documentElement).appendChild($style!)
+    }
+  }
+  $style.textContent = style
+}