Update hotkey.js

packages/artplayer/src/hotkey.js

@@ -1,35 +1,41 @@
 export default class Hotkey {
     constructor(art) {
         this.keys = {};
-        if (art.option.hotkey) {
+
+        const {
+            option,
+            player,
+            events: { proxy },
+        } = art;
+
+        if (option.hotkey) {
             art.on('ready', () => {
                 this.add(27, () => {
-                    if (art.player.fullscreenWeb) {
-                        art.player.fullscreenWeb = false;
+                    if (player.fullscreenWeb) {
+                        player.fullscreenWeb = false;
                     }
                 });
 
                 this.add(32, () => {
-                    art.player.toggle = true;
+                    player.toggle = true;
                 });
 
                 this.add(37, () => {
-                    art.player.seek = art.player.currentTime - 5;
+                    player.seek = player.currentTime - 5;
                 });
 
                 this.add(38, () => {
-                    art.player.volume += 0.1;
+                    player.volume += 0.1;
                 });
 
                 this.add(39, () => {
-                    art.player.seek = art.player.currentTime + 5;
+                    player.seek = player.currentTime + 5;
                 });
 
                 this.add(40, () => {
-                    art.player.volume -= 0.1;
+                    player.volume -= 0.1;
                 });
 
-                const { proxy } = art.events;
                 proxy(window, 'keydown', event => {
                     if (art.isFocus) {
                         const tag = document.activeElement.tagName.toUpperCase();