fix error in reading empty danmaku list

demo/demo.js

@@ -149,26 +149,26 @@ function initPlayers () {
     //     }
     // });
 
-    // window.dp6 = new DPlayer({
-    //     container: document.getElementById('dplayer6'),
-    //     preload: 'none',
-    //     live: true,
-    //     danmaku: true,
-    //     apiBackend: {
-    //         read: function (endpoint, callback) {
-    //             console.log('假装 WebSocket 连接成功');
-    //             callback();
-    //         },
-    //         send: function (endpoint, danmakuData, callback) {
-    //             console.log('假装通过 WebSocket 发送数据', danmakuData);
-    //             callback();
-    //         }
-    //     },
-    //     video: {
-    //         url: 'https://moeplayer.b0.upaiyun.com/dplayer/hls/hikarunara.m3u8',
-    //         type: 'hls'
-    //     }
-    // });
+    window.dp6 = new DPlayer({
+        container: document.getElementById('dplayer6'),
+        preload: 'none',
+        live: true,
+        danmaku: true,
+        apiBackend: {
+            read: function (endpoint, callback) {
+                console.log('假装 WebSocket 连接成功');
+                callback();
+            },
+            send: function (endpoint, danmakuData, callback) {
+                console.log('假装通过 WebSocket 发送数据', danmakuData);
+                callback();
+            }
+        },
+        video: {
+            url: 'https://moeplayer.b0.upaiyun.com/dplayer/hls/hikarunara.m3u8',
+            type: 'hls'
+        }
+    });
 }
 
 function clearPlayers () {

demo/index.html

@@ -56,7 +56,7 @@
 
     <h2 id="live">Live</h2>
     <div class="example">
-        <button class="btn" onclick="drawDanmaku()">假装收到 WebSocket 弹幕</button>
+        <button class="btn" onclick="dp6.danmaku.draw({text: '假装收到 WebSocket 弹幕', color: '#fff', type: 'right'})">假装收到 WebSocket 弹幕</button>
         <div id="dplayer6"></div>
     </div>
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dplayer",
-  "version": "1.19.0",
+  "version": "1.19.1",
   "description": "Wow, such a lovely HTML5 danmaku video player",
   "main": "dist/DPlayer.min.js",
   "style": "dist/DPlayer.min.css",

src/js/danmaku.js

@@ -68,13 +68,18 @@ class Danmaku {
             }
             else {
                 const typeMap = ['right', 'top', 'bottom'];
-                results[i] = data.map((item) => ({
-                    time: item[0],
-                    type: typeMap[item[1]],
-                    color: item[2],
-                    author: item[3],
-                    text: item[4]
-                }));
+                if (data) {
+                    results[i] = data.map((item) => ({
+                        time: item[0],
+                        type: typeMap[item[1]],
+                        color: item[2],
+                        author: item[3],
+                        text: item[4]
+                    }));
+                }
+                else {
+                    results[i] = [];
+                }
             }
             if (readCount === endpoints.length) {
                 return callback(results);