From 54eba0dc17a4b31f0b87c5f4bf7e5834bc68e5ec Mon Sep 17 00:00:00 2001
From: taxilng <769967440@qq.com>
Date: Thu, 24 May 2018 10:30:28 +0800
Subject: [PATCH] Update symbol.md
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demo不能在游览器上直接运行，故修改下；
---
 docs/symbol.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/symbol.md b/docs/symbol.md
index 90126a3..f86005b 100644
--- a/docs/symbol.md
+++ b/docs/symbol.md
@@ -163,13 +163,15 @@ let obj = {
 Symbol 类型还可以用于定义一组常量，保证这组常量的值都是不相等的。
 
 ```javascript
+const log = {};
+
 log.levels = {
   DEBUG: Symbol('debug'),
   INFO: Symbol('info'),
   WARN: Symbol('warn')
 };
-log(log.levels.DEBUG, 'debug message');
-log(log.levels.INFO, 'info message');
+console.log(log.levels.DEBUG, 'debug message');
+console.log(log.levels.INFO, 'info message');
 ```
 
 下面是另外一个例子。