add types.test.js

packages/artplayer-document/docs/en/Questions/How to import types.md

@@ -0,0 +1,25 @@
+---
+title: How to import types
+sidebar_position: 4
+---
+
+Sometimes you lose `TypeScript` syntax prompt, then you can import types manually
+
+
+```js
+/**
+ * @typedef { import("artplayer/types/artplayer") } Artplayer
+ */
+
+/**
+ * @type {Artplayer} - An Artplayer instance.
+ */
+const art1 = {};
+
+/**
+ * @param {Artplayer}  art2 - An Artplayer instance.
+ */
+function getInstance(art2) {
+  //
+}
+```