diff --git a/README.md b/README.md
index b6826a3a3..1db16673e 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,15 @@
 
 ## Install
 
+Install with `npm`:
+
 ```
-$ npm install --save artplayer
+$ npm install artplayer
+```
+Or install with `yarn`:
+
+```
+$ yarn add artplayer
 ```
 
 ```js
@@ -29,7 +36,7 @@ import Artplayer from 'artplayer';
 import 'artplayer/dist/artplayer.css';
 ```
 
-OR umd builds are also available
+Or umd builds are also available:
 
 ```html
 <link rel="stylesheet" href="path/to/artplayer.css" />
diff --git a/docs/docs/README.md b/docs/docs/README.md
index 239aa6a87..ba26b9818 100644
--- a/docs/docs/README.md
+++ b/docs/docs/README.md
@@ -839,13 +839,11 @@ var art = new Artplayer({
 });
 ```
 
-# API
-
-## Instance properties
+# Instance properties
 
 > TODO...
 
-## Class static properties
+# Class static properties
 
 > TODO...
 
diff --git a/docs/docs/runCode.js b/docs/docs/runCode.js
index 0db6a28be..e2300cfbb 100644
--- a/docs/docs/runCode.js
+++ b/docs/docs/runCode.js
@@ -4,7 +4,7 @@ window.runCode = function(hook) {
       .filter(function(item) {
         return item.innerHTML === 'Run Code';
       })
-      .forEach(item => {
+      .forEach(function(item) {
         item.addEventListener('click', function(event) {
           event.preventDefault();
           var codeElement = item.parentElement.nextElementSibling;