fix: trigger video event

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dplayer",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "Wow, such a lovely HTML5 danmaku video player",
   "main": "dist/DPlayer.min.js",
   "style": "dist/DPlayer.min.css",

src/DPlayer.js

@@ -1,4 +1,4 @@
-console.log('\n %c DPlayer 1.4.0 %c http://dplayer.js.org \n\n', 'color: #fadfa3; background: #030307; padding:5px 0;', 'background: #fadfa3; padding:5px 0;');
+console.log('\n %c DPlayer 1.4.1 %c http://dplayer.js.org \n\n', 'color: #fadfa3; background: #030307; padding:5px 0;', 'background: #fadfa3; padding:5px 0;');
 
 require('./DPlayer.scss');
 const utils = require('./utils.js');

src/video.js

@@ -72,8 +72,10 @@ class Video {
     // trigger event
     trigger (type, event) {
         const events = type === 'all' ? this.eventAll : this.eventCurrent;
-        for (let i = 0; i < events[event].length; i++) {
-            events[event][i]();
+        if (events[event]) {
+            for (let i = 0; i < events[event].length; i++) {
+                events[event][i]();
+            }
         }
     }