diff --git a/docs/docs/favicon.ico b/docs/docs/favicon.ico
new file mode 100644
index 000000000..1b9f010e8
Binary files /dev/null and b/docs/docs/favicon.ico differ
diff --git a/docs/docs/index.html b/docs/docs/index.html
index 65f3a765b..551317322 100644
--- a/docs/docs/index.html
+++ b/docs/docs/index.html
@@ -1,11 +1,13 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
-  <meta charset="UTF-8">
   <title>ArtPlayer Document</title>
-  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
-  <meta name="description" content="ArtPlayer Document">
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+  <meta name="keywords" content="artplayer,html5,video,player">
+  <meta name="description" content="ArtPlayer is a modern HTML5 video player">
+  <link rel="shortcut icon" href="./favicon.ico">
   <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/vue.css">
 </head>
 <body>
@@ -21,5 +23,14 @@
     }
   </script>
   <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
+  <script>
+      var _hmt = _hmt || [];
+      (function() {
+        var hm = document.createElement("script");
+        hm.src = "https://hm.baidu.com/hm.js?b6c9b8bafbf5fe7225160101dafbbc7d";
+        var s = document.getElementsByTagName("script")[0]; 
+        s.parentNode.insertBefore(hm, s);
+      })();
+  </script>
 </body>
 </html>
diff --git a/docs/docs/runCode.js b/docs/docs/runCode.js
index 03ac24661..40163c4f7 100644
--- a/docs/docs/runCode.js
+++ b/docs/docs/runCode.js
@@ -12,15 +12,9 @@ window.runCode = function(hook) {
             codeElement.tagName === 'PRE' &&
             codeElement.dataset.lang === 'js'
           ) {
-            var libs = item.href.split('/lib=')[1];
+            var libs = item.href.split('/lib=')[1] || '';
             var code = encodeURIComponent(codeElement.innerText);
-            var url = 'https://artplayer.org/lab/?';
-            if (libs) {
-              url += 'libs=' + libs + '&';
-            }
-            if (code) {
-              url += 'code=' + code;
-            }
+            var url = 'https://artplayer.org/lab/?libs=' + libs + '&code=' + code;
             window.open(url);
           }
         });
diff --git a/docs/lab/index.html b/docs/lab/index.html
index 824d33d04..ee9ba8af2 100644
--- a/docs/lab/index.html
+++ b/docs/lab/index.html
@@ -5,7 +5,7 @@
     <title>ArtPlayer.js Lab</title>
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0,minimal-ui">
+    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
     <meta name="keywords" content="artplayer,html5,video,player">
     <meta name="description" content="ArtPlayer is a modern HTML5 video player">
     <link rel="shortcut icon" href="./img/favicon.ico">
@@ -46,7 +46,7 @@
         var _hmt = _hmt || [];
         (function() {
           var hm = document.createElement("script");
-          hm.src = "https://hm.baidu.com/hm.js?59d546bcda559725a968939647a0dcae";
+          hm.src = "https://hm.baidu.com/hm.js?b6c9b8bafbf5fe7225160101dafbbc7d";
           var s = document.getElementsByTagName("script")[0]; 
           s.parentNode.insertBefore(hm, s);
         })();
diff --git a/docs/lab/js/common.js b/docs/lab/js/common.js
index d2df4cc53..4bccbad2c 100644
--- a/docs/lab/js/common.js
+++ b/docs/lab/js/common.js
@@ -1,3 +1,5 @@
+'use strict';
+
 (function() {
     var $code = document.querySelector('.code');
     var $run = document.querySelector('.run');
@@ -19,18 +21,17 @@
     });
 
     function initArt(art) {
-        Artplayer.config.video.events.forEach(item => {
-            art.on('video:' + item, event => {
+        Artplayer.config.video.events.forEach(function(item) {
+            art.on('video:' + item, function(event) {
                 console.log('video: ' + event.type);
             });
         });
     }
 
     function getURLParameters(url) {
-        return (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce(
-            (a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a),
-            {},
-        );
+        return (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce(function(a, v) {
+            return (a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a;
+        }, {});
     }
 
     function getExt(url) {
@@ -105,21 +106,21 @@
             runCode();
         } else {
             fetch('./js/example.js')
-                .then(response => {
+                .then(function(response) {
                     return response.text();
                 })
-                .then(text => {
+                .then(function(text) {
                     mirror.setValue(text);
                     runCode();
                 })
-                .catch(err => {
+                .catch(function(err) {
                     console.error(err.message);
                 });
         }
     }
 
     function runCode() {
-        Artplayer.instances.forEach(art => {
+        Artplayer.instances.forEach(function(art) {
             art.destroy(true);
         });
         var code = mirror.getValue();
@@ -129,28 +130,31 @@
     }
 
     function initApp() {
-        const { code, libs } = getURLParameters(window.location.href);
+        var _getURLParameters = getURLParameters(window.location.href),
+            code = _getURLParameters.code,
+            libs = _getURLParameters.libs;
+
         loadLib(libs)
             .then(function(result) {
                 loaddLib = loaddLib.concat(result);
                 loadCode(code);
             })
-            .catch(err => {
+            .catch(function(err) {
                 console.error(err.message);
             });
     }
 
+    window.addEventListener('error', function(err) {
+        console.error(err.message);
+    });
+
     $run.addEventListener('click', function(e) {
-        const libs = encodeURIComponent($lib.value);
-        const code = encodeURIComponent(mirror.getValue());
-        const url = window.location.origin + window.location.pathname + '?libs=' + libs + '&code=' + code;
+        var libs = encodeURIComponent($lib.value);
+        var code = encodeURIComponent(mirror.getValue());
+        var url = window.location.origin + window.location.pathname + '?libs=' + libs + '&code=' + code;
         history.pushState(null, null, url);
         initApp();
     });
 
-    window.addEventListener('error', err => {
-        console.error(err.message);
-    });
-
     initApp();
 })();