更新了部分文档

jackfrued · jackfrued · commit eb2cb5f0fcfe · 2019-12-18T15:53:51.000+08:00
diff --git a/Day21-30/21-30.Web前端概述.md b/Day21-30/21-30.Web前端概述.md
@@ -288,7 +288,7 @@
     - `delete`关键字
  - 标准对象
     - `Number` / `String` / `Boolean` / `Symbol` / `Array` / `Function` 
-    - `Date` / `Error` / `Math` / `RegEx` / `Object` / `Map` / `Set`
+    - `Date` / `Error` / `Math` / `RegExp` / `Object` / `Map` / `Set`
     - `JSON` / `Promise` / `Generator` / `Reflect` / `Proxy`
 
 #### BOM
