add autoPlayback

packages/artplayer/src/plugins/autoPlayback.js

@@ -0,0 +1,22 @@
+export default function autoPlayback(art) {
+    const { storage } = art;
+
+    art.on('video:timeupdate', () => {
+        const times = storage.get('times') || {};
+        times[art.option.url] = art.currentTime;
+        storage.set('times', times);
+    });
+
+    art.on('ready', () => {
+        const times = storage.get('times') || {};
+        const currentTime = times[art.option.url];
+        if (currentTime) {
+            art.seek = currentTime;
+            art.notice.show = '';
+        }
+    });
+
+    return {
+        name: 'autoPlayback',
+    };
+}