diff --git a/JavaScript/img/right_go.svg b/JavaScript/img/right_go.svg
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+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1605718037944" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="1346" width="32" height="32" xmlns:xlink="http://www.w3.org/1999/xlink"><defs><style type="text/css"></style></defs><path d="M514 912c-219.9 0-398.8-178.9-398.8-398.9 0-219.9 178.9-398.8 398.8-398.8s398.8 178.9 398.8 398.8c0 220-178.9 398.9-398.8 398.9z m0-701.5c-166.9 0-302.7 135.8-302.7 302.7S347.1 815.9 514 815.9s302.7-135.8 302.7-302.7S680.9 210.5 514 210.5z" fill="#BDD2EF" p-id="1347"></path><path d="M746.1 471.6L582 307.5c-22.9-22.9-60.2-22.9-83.1 0-22.9 22.9-22.9 60.2 0 83.1l63.8 63.8H334c-32.5 0-58.8 26.3-58.8 58.8S301.5 572 334 572h228.7l-63.8 63.8c-11.5 11.5-17.2 26.5-17.2 41.5s5.7 30.1 17.2 41.5c22.9 22.9 60.2 22.9 83.1 0l164.1-164.1c22.9-22.9 22.9-60.1 0-83.1z" fill="#2867CE" p-id="1348"></path></svg>
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diff --git a/JavaScript/javascript.md b/JavaScript/javascript.md
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+# JavaScript
+## [基本概念](./基本概念.md)
+## [数组](./数组.md)
+## 字符串
+## number
+## 日期
+## Json
+## 面向对象
+## DOM
+## BOM
+## 事件
diff --git "a/JavaScript/\345\237\272\346\234\254\346\246\202\345\277\265.md" "b/JavaScript/\345\237\272\346\234\254\346\246\202\345\277\265.md"
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+## 操作符
+## 流程
+## 数据类型
+1. [typeof](#typeof)
+
+
+## 数据类型的转换
+1. 数据类型转换的逻辑
+
+### <span id="流程">流程 </span>
+1. 判断
+2. 循环
+
+### <h3 id="typeof"> typeof ![GO](./img/right_go.svg) </h3>
+1.   
+2.   
+3.   
+
diff --git "a/JavaScript/\346\225\260\347\273\204.md" "b/JavaScript/\346\225\260\347\273\204.md"
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+## 常用函数
+|函数名| 作用 | 返回值 |示例 |
+|:-:|:-:|:-:|:-:|
+| [] ,new Array(), | 声明数组 | array  | | 
+| length | 长度 | number | | 
+| Array.isArray(array_name)| 是否数组 | bool | [valueOf示例](#valueOf) |
+| array_name.toString() | 转为字符串  | string | |
+
+
+
+#### <span id="valueOf">valueOf</span>
+````
+var a=["name","age","sex"];
+if(Array.isArray(a.valueOf())){
+    console.log("a.valueOf是一个数组");
+    console.log(a.valueOf());
+}
+
+[result]:  a.valueOf是一个数组
+[result]:  ["name", "age", "sex"]
+
+
+1. Array.isArray() 判断数组
+2. array_name.valueOf()  。。。鸡肋
+````
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