update docs

packages/artplayer-document/docs/en/Questions/Create selector in the controls.md

@@ -0,0 +1,38 @@
+---
+title: 在控制栏添加列表
+sidebar_position: 1
+---
+
+有时你需要在控制栏添加列表，那么你可以在添加控件的时候使用 `selector` 和 `onSelect` 属性
+
+<div className="run-code">▶ Run Code</div>
+
+```js
+var art = new Artplayer({
+    container: '.artplayer-app',
+    url: '/assets/sample/video.mp4',
+    controls: [
+        {
+            position: 'right',
+            html: 'Subtitle 01',
+            selector: [
+                {
+                    html: '<span style="color:red">Subtitle 01</span>',
+                    url: '/assets/sample/subtitle.srt?id=1',
+                },
+                {
+                    html: '<span style="color:yellow">Subtitle 02</span>',
+                    url: '/assets/sample/subtitle.srt?id=2',
+                },
+            ],
+            onSelect: function (item, $dom) {
+                art.subtitle.switch(item.url, {
+                    name: $dom.innerText,
+                });
+
+                return '你点击了' + item.html;
+            },
+        },
+    ],
+});
+```